Removed spechomo classifiers from gms_preprocessing/database as they are now included in external spechomo library. Removed parameter 'path_SRFs' from options file because SRFs are now provided by external pyrsr library. Removed 'RR' as possible spechomo_method. Updated HISTORY.rst and version info.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>