Removed trailing whitespace.
Added the ability to revoke a lynch vote.

This is useful if you don't want to merely change your vote, but actually revoke your vote until you make another decision.
Merge branch 'ONUWW' of https://github.com/mwoghiren/cinch-onwwgame into mwoghiren-ONUWW

Conflicts:
	lib/cinch/plugins/changelog.yml