Mute endpoints for the API

Added the create, destroy, list and list IDs mute(s) endpoints.

Roughly modelled on the similar-ish block user functions (note: the "mutes/users" instead of just "mutes" appears to be intentional by Twitter).

Also added myself to AUTHORS.rst because I reckon adding API bits makes the grade.  ;)

Also purged my old repo which was just getting stupidly worse (I've got a backup if things ought to be extracted from it, but all the good changes were getting tainted by the bad so I nuked it).