Added the MotD and unstuck to the vote menu

Not so vote menu, more just one click command menu now.
Added pregame countdown plugin

- Allows for a custom pregame length and shows a 5 second countdown
before the round starts by default.
- Also improved the screen text library so that text on screen now fades
in and out smoothly.
Merge pull request #32 from Person8880/develop

Added pregame countdown plugin