- updated license tags in spec file

- gsl 2.5:
* doc bug fix in binomial distribution figure
* added Wishart distribution
* added new module for digital filtering (gsl_filter); current
filters include:
Gaussian filter
median filter
recursive median filter
impulse detection filter
* added new module for moving window statistics (gsl_movstat)
* added statistics functions:
gsl_stats_median()
gsl_stats_select()
gsl_stats_mad()
gsl_stats_mad0()
gsl_stats_Sn_from_sorted_data()
gsl_stats_Qn_from_sorted_data()
gsl_stats_gastwirth_from_sorted_data()
gsl_stats_trmean_from_sorted_data()
* added Romberg integration (gsl_integration_romberg)
* bug fix in deprecated functions gsl_multifit_wlinear_svd and
gsl_multifit_wlinear_usvd (reported by Vlad Koli)
* documention corrected to state that gsl_sf_legendre functions
do not include Condon-Shortley phase by default
* bug fix in exponential fitting example when using larger number
of points
* changed internal workspace inside gsl_spmatrix to a union to
avoid casting
* bug fixes in ode-initval2 for very rare solver crashing cases
* add histogram2d figure to manual
* bug fix in gsl_spmatrix_add for duplicate input arguments
* add support for negative arguments nu in gsl_sf_bessel_Jnu and
gsl_sf_bessel_Ynu (Konrad Griessinger)
* better texinfo documentation for gsl_sf_hyperg functions
* fix vector and matrix fread/fwrite testing on windows systems
when tmpfile() fails
- drop rstat_test.patch, is upstream