Merge pull request #5 from AlexHayton/master

New files for base difficulty and upgrades and the dialogue entity.
added timed lifetime + attack nearest when attacked for bots, added infinite spawn and possiblity to disable wave manager, fixed once per steam id and difficulty thing, no name name for bots disabled
fixed clip weapon bug, npcs not attacking players when attack structures bug and onos will sprint sometimes
Merge branch 'master' of github.com:JimWest/ExtraEntitesMod

Conflicts:
	output/lua/ExtraEntitiesMod/eem_Player_Client.lua
Finished the code skeleton for the DIalogue entity. The GUI still needs debugging.