bump github; fix user agents; tweak egg

* Bumped Github
** Fix User-Agent issue
** Add ``~grate`` command to see current API rate-limiting status
** Tidy code
* Canonicalize Depressionbot
** Add CANONICAL AUBERGINE
** Contemplate adding CANONICAL AUBERGINE before deciding against it because who the hell has aubergine as a corporate colour
** Colour progress bars orange when canonical mode is activated