Adding Geanypy to geany-plugins

Adding Geanypy to geany-plugins, based on minimal changes to codebrainz upstream

* autotools builds work for me, but could probably benefit from an expert checking it out
* gcc/clang cflags options used to silence warnings, may not work for other compilers
* no waf
* the windows src/makefile.win32 from codebrainz upstream is included, but untested in a geany-plugins context