Allow Leap:42.3 to build by defining %python2_sitearch to python_sitearch.
Use %license on license file.
- Mention baselibs.conf
- Make python2 dependency conditional bsc#1076407
- Remove few path based requires/etc
- Conflict properly with older libkate in order to allow migration
and not clash with liboggkate1 library
- Tell doxygen not to include timestamps to help build-compare