GitHub: enhance formatting.
Coinpan: Skip tests on Python 2.
travis.yml: Remove pygraphviz from the deps (incompatible with Python 3…)
MeditationExcuses: Remove plugin (website is down).
NoisyKarma: Fix issue with keys being converted to string.
NoisyKarma: Fix Python 2.6 compatibility.
Website: Fix tests.
.travis.yml: Remove pygraphviz from dependencies as it is not compatible with Python 3.
WebStats: Fix commit c5c89111.
Coinpan: Fix
GitHub: Fix announces.
Sudo: Show used command in the log when sudo is not granted.
WebStats: Add Python 3 compatibility (not tested).
WebStats: Add Python 3 compatibility (again; still not tested).
WikiTrans: Fix tests.
.travis.yml: Disable plugin Darkfallonline.