Changelog:
- Added support for native C complex number types in gsl_complex when using a C11 compiler.
- Updated exponential fitting example for nonlinear least squares.
- Added banded LU decomposition and solver (gsl_linalg_LU_band).
- Added new functions to the library.
- Made gsl_sf_legendre_array_index inline.
- Fixed many bugs.
Signed-off-by: Martin Reboredo <yakoyoku@gmail.com>