Implemented oovu.events.EventManager.

EventManager handles the logic for parsing event scripts, maintaining
event state, and selecting and executing events.
Integrated EventManager into RootServer.

Now that event-handling logic has been severed from the root server,
it's conceivable that there could be multiple event managers in effect
simultaneously.
Improved cuescript module.
Improved cuescript module.
Integrated file watching into cuescript module.
Renamed oovu.cuescript to oovu.eventscript.
Updated overview patcher and clippings.
Updated java-doc.
Created stub modules for pitch and envelope followers.