An ugly, functional and state-retaining dialog for adjusting a player's time.

Also remove redundancies from player's time-keeping. The time is now internally only counted in the positive direction.
Add some ignores.
Keep timer going after it reaches zero

Show negative time values in red. Also improves timer functionality in general and fixes #2.
Merge pull request #11 from Waiski/devel

An ugly, functional and state-retaining dialog for adjusting a player's time and other timer improvements