updated with main repo

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diff --git a/thirdparty/includes/GSL/gsl/gsl_multifit.h b/thirdparty/includes/GSL/gsl/gsl_multifit.h
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+/* multifit/gsl_multifit.h
+ * 
+ * Copyright (C) 2000, 2007, 2010 Brian Gough
+ * Copyright (C) 2013, Patrick Alken
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GSL_MULTIFIT_H__
+#define __GSL_MULTIFIT_H__
+
+#include <stdlib.h>
+#include <gsl/gsl_math.h>
+#include <gsl/gsl_vector.h>
+#include <gsl/gsl_matrix.h>
+#include <gsl/gsl_types.h>
+
+#undef __BEGIN_DECLS
+#undef __END_DECLS
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS /* empty */
+# define __END_DECLS /* empty */
+#endif
+
+__BEGIN_DECLS
+
+typedef struct 
+{
+  size_t nmax;         /* maximum number of observations */
+  size_t pmax;         /* maximum number of parameters */
+  size_t n;            /* number of observations in current SVD decomposition */
+  size_t p;            /* number of parameters in current SVD decomposition */
+  gsl_matrix * A;      /* least squares matrix for SVD, n-by-p */
+  gsl_matrix * Q;
+  gsl_matrix * QSI;
+  gsl_vector * S;
+  gsl_vector * t;
+  gsl_vector * xt;
+  gsl_vector * D;
+  double rcond;        /* reciprocal condition number */
+} 
+gsl_multifit_linear_workspace;
+
+gsl_multifit_linear_workspace *
+gsl_multifit_linear_alloc (const size_t n, const size_t p);
+
+void
+gsl_multifit_linear_free (gsl_multifit_linear_workspace * w);
+
+int
+gsl_multifit_linear (const gsl_matrix * X,
+                     const gsl_vector * y,
+                     gsl_vector * c,
+                     gsl_matrix * cov,
+                     double * chisq,
+                     gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_svd (const gsl_matrix * X,
+                         gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_bsvd (const gsl_matrix * X,
+                          gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_solve (const double lambda,
+                           const gsl_matrix * X,
+                           const gsl_vector * y,
+                           gsl_vector * c,
+                           double *rnorm,
+                           double *snorm,
+                           gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_applyW(const gsl_matrix * X,
+                           const gsl_vector * w,
+                           const gsl_vector * y,
+                           gsl_matrix * WX,
+                           gsl_vector * Wy);
+
+int
+gsl_multifit_linear_stdform1 (const gsl_vector * L,
+                              const gsl_matrix * X,
+                              const gsl_vector * y,
+                              gsl_matrix * Xs,
+                              gsl_vector * ys,
+                              gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_wstdform1 (const gsl_vector * L,
+                               const gsl_matrix * X,
+                               const gsl_vector * w,
+                               const gsl_vector * y,
+                               gsl_matrix * Xs,
+                               gsl_vector * ys,
+                               gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_L_decomp (gsl_matrix * L, gsl_vector * tau);
+
+int
+gsl_multifit_linear_stdform2 (const gsl_matrix * LQR,
+                              const gsl_vector * Ltau,
+                              const gsl_matrix * X,
+                              const gsl_vector * y,
+                              gsl_matrix * Xs,
+                              gsl_vector * ys,
+                              gsl_matrix * M,
+                              gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_wstdform2 (const gsl_matrix * LQR,
+                               const gsl_vector * Ltau,
+                               const gsl_matrix * X,
+                               const gsl_vector * w,
+                               const gsl_vector * y,
+                               gsl_matrix * Xs,
+                               gsl_vector * ys,
+                               gsl_matrix * M,
+                               gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_genform1 (const gsl_vector * L,
+                              const gsl_vector * cs,
+                              gsl_vector * c,
+                              gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_genform2 (const gsl_matrix * LQR,
+                              const gsl_vector * Ltau,
+                              const gsl_matrix * X,
+                              const gsl_vector * y,
+                              const gsl_vector * cs,
+                              const gsl_matrix * M,
+                              gsl_vector * c,
+                              gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_wgenform2 (const gsl_matrix * LQR,
+                               const gsl_vector * Ltau,
+                               const gsl_matrix * X,
+                               const gsl_vector * w,
+                               const gsl_vector * y,
+                               const gsl_vector * cs,
+                               const gsl_matrix * M,
+                               gsl_vector * c,
+                               gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_lreg (const double smin, const double smax,
+                          gsl_vector * reg_param);
+
+int
+gsl_multifit_linear_lcurve (const gsl_vector * y,
+                            gsl_vector * reg_param,
+                            gsl_vector * rho, gsl_vector * eta,
+                            gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_lcorner(const gsl_vector *rho,
+                            const gsl_vector *eta,
+                            size_t *idx);
+
+int
+gsl_multifit_linear_lcorner2(const gsl_vector *reg_param,
+                             const gsl_vector *eta,
+                             size_t *idx);
+
+int
+gsl_multifit_linear_Lk(const size_t p, const size_t k, gsl_matrix *L);
+
+int
+gsl_multifit_linear_Lsobolev(const size_t p, const size_t kmax,
+                             const gsl_vector *alpha, gsl_matrix *L,
+                             gsl_multifit_linear_workspace *work);
+
+int
+gsl_multifit_wlinear (const gsl_matrix * X,
+                      const gsl_vector * w,
+                      const gsl_vector * y,
+                      gsl_vector * c,
+                      gsl_matrix * cov,
+                      double * chisq,
+                      gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_wlinear_svd (const gsl_matrix * X,
+                          const gsl_vector * w,
+                          const gsl_vector * y,
+                          double tol,
+                          size_t * rank,
+                          gsl_vector * c,
+                          gsl_matrix * cov,
+                          double *chisq, 
+                          gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_wlinear_usvd (const gsl_matrix * X,
+                           const gsl_vector * w,
+                           const gsl_vector * y,
+                           double tol,
+                           size_t * rank,
+                           gsl_vector * c,
+                           gsl_matrix * cov,
+                           double *chisq, 
+                           gsl_multifit_linear_workspace * work);
+
+int
+gsl_multifit_linear_est (const gsl_vector * x,
+                         const gsl_vector * c,
+                         const gsl_matrix * cov, double *y, double *y_err);
+
+double
+gsl_multifit_linear_rcond (const gsl_multifit_linear_workspace * w);
+
+int
+gsl_multifit_linear_residuals (const gsl_matrix *X, const gsl_vector *y,
+                               const gsl_vector *c, gsl_vector *r);
+
+typedef struct
+{
+  const char * name;     /* method name */
+  int (*wfun)(const gsl_vector *r, gsl_vector *w);
+  int (*psi_deriv)(const gsl_vector *r, gsl_vector *dpsi);
+  double tuning_default; /* default tuning constant */
+} gsl_multifit_robust_type;
+
+typedef struct
+{
+  double sigma_ols;    /* OLS estimate of sigma */
+  double sigma_mad;    /* MAD estimate of sigma */
+  double sigma_rob;    /* robust estimate of sigma */
+  double sigma;        /* final estimate of sigma */
+  double Rsq;          /* R^2 coefficient of determination */
+  double adj_Rsq;      /* degree of freedom adjusted R^2 */
+  double rmse;         /* root mean squared error */
+  double sse;          /* residual sum of squares */
+  size_t dof;          /* degrees of freedom */
+  size_t numit;        /* number of iterations */
+  gsl_vector *weights; /* final weights */
+  gsl_vector *r;       /* final residuals y - X c */
+} gsl_multifit_robust_stats;
+
+typedef struct
+{
+  size_t n;            /* number of observations */
+  size_t p;            /* number of parameters */
+  size_t numit;        /* number of iterations */
+  size_t maxiter;      /* maximum iterations */
+  const gsl_multifit_robust_type *type;
+  double tune;         /* tuning parameter */
+
+  gsl_vector *r;       /* residuals at current iteration */
+  gsl_vector *weights; /* weights at current iteration */
+  gsl_vector *c_prev;  /* coefficients from previous iteration */
+  gsl_vector *resfac;  /* multiplicative factors for residuals */
+
+  gsl_vector *psi;     /* psi(r) */
+  gsl_vector *dpsi;    /* psi'(r) */
+
+  gsl_matrix *QSI;     /* Q S^{-1} of original matrix X */
+  gsl_vector *D;       /* balancing parameters of original matrix X */
+
+  gsl_vector *workn;   /* workspace of length n */
+
+  gsl_multifit_robust_stats stats; /* various statistics */
+
+  gsl_multifit_linear_workspace *multifit_p;
+} gsl_multifit_robust_workspace;
+
+/* available types */
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_default;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_bisquare;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_cauchy;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_fair;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_huber;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_ols;
+GSL_VAR const gsl_multifit_robust_type * gsl_multifit_robust_welsch;
+
+gsl_multifit_robust_workspace *gsl_multifit_robust_alloc(const gsl_multifit_robust_type *T,
+                                                         const size_t n, const size_t p);
+void gsl_multifit_robust_free(gsl_multifit_robust_workspace *w);
+int gsl_multifit_robust_tune(const double tune,
+                             gsl_multifit_robust_workspace *w);
+int gsl_multifit_robust_maxiter(const size_t maxiter,
+                                gsl_multifit_robust_workspace *w);
+const char *gsl_multifit_robust_name(const gsl_multifit_robust_workspace *w);
+gsl_multifit_robust_stats gsl_multifit_robust_statistics(const gsl_multifit_robust_workspace *w);
+int gsl_multifit_robust_weights(const gsl_vector *r, gsl_vector *wts,
+                                gsl_multifit_robust_workspace *w);
+int gsl_multifit_robust(const gsl_matrix * X, const gsl_vector * y,
+                        gsl_vector * c, gsl_matrix *cov,
+                        gsl_multifit_robust_workspace *w);
+int gsl_multifit_robust_est(const gsl_vector * x, const gsl_vector * c,
+                            const gsl_matrix * cov, double *y, double *y_err);
+int gsl_multifit_robust_residuals(const gsl_matrix * X,
+                                  const gsl_vector * y,
+                                  const gsl_vector * c, gsl_vector * r,
+                                  gsl_multifit_robust_workspace * w);
+
+__END_DECLS
+
+#endif /* __GSL_MULTIFIT_H__ */