Add Origin data type
Add targetname property to Entity class
Add module for Source Engine game logic entities
Add TF2 game logic entity classes
Apparently logic_auto entities should have spawnflags=1
Connections can be used now
TF2 Koth logic now sets more of itself up
Koth example now has the KOTH HUD and timers set up
Add TF2 classes for capture points
Basic functionality of koth example complete. Fixes #2