More AFK kick reworking

My testing showed it now won't kick those in the respawn queue, I sure
hope that's the case!
How did I forget this?

You can set the time offset from GMT now.
Added forced maps list to the map vote plugin

- Allows you to specify a list of maps that will always be an option in
the map vote.
- Fixed nominations not clearing after a vote.
Merge pull request #79 from Person8880/develop

AFK kick tweaks, forced maps and time offset