setup.py: Build plugin list automatically
setup.py: Build plugin list automatically

Signed-off-by: James Vega <91ae71a1168cea0b65ac9975da69d5a7753116be@users.sourceforge.net>

mazaclub/mazabot-core,jeffmahoney/supybot,ProgVal/Limnoria-test,mazaclub/mazabot-core,frumiousbandersnatch/supybot-code,haxwithaxe/supybot,prashantpawar/supybot-rothbot,Ban3/Limnoria,ProgVal/Limnoria-test,buildbot/supybot,raboof/supybot,kblin/supybot-gsoc,Ban3/Limnoria