-Added testing chat command and functions for forcing a server crash

-Added chat log file
-Added error handling around EntityEventManager.AddEvent
-Added TONS of error catching+dumping to ServerAssemblyWrapper
-Added TONS of error catching+dumping to main application
-Increased tree view refresh time from 500ms to 1000ms
-Reduced status check timer from 750ms to 500ms
-Added some more error checking in sector object node rendering
-Added Shutdown method to plugin base

-Added plugin state to plugin manager
-Added methods for initializing and shutting down individual plugins to plugin manager
-Added GUI buttons in plugins tab for refreshing plugins, loading and unloading plugins
Fixed Conflict in PluginManager.cs
Merge branch 'SEModCommunity-master'