Wrappers for selected functions described at:
http://www.google.com/search?q=gsl_sf_dawson.h&as_sitesearch=www.gnu.org/software/gsl/manual&btnI=Lucky
wrapper for int gsl_sf_dawson_e(double x,gsl_sf_result* result);
http://www.google.com/search?q=gsl_sf_dawson_e&as_sitesearch=www.gnu.org/software/gsl/manual&btnI=Lucky
wrapper for double gsl_sf_dawson(double x);
http://www.google.com/search?q=gsl_sf_dawson&as_sitesearch=www.gnu.org/software/gsl/manual&btnI=Lucky