TriggerHelper functions to retrieve entities by player and by class.
Removes repetitive RangeManager and Identity component querying from triggerscripts.
It means that mostly map specific logic remains in the triggerscript.
This should bring TriggerScript coding a bit closer to map authors who aren't exactly software developers.
Call the RangeManager entity getters on Danubius and Survival multiple times on init to further simplify code, as these microseconds on init are irrelevant.
git-svn-id: https://svn.wildfiregames.com/public/ps/trunk@21459 3db68df2-c116-0410-a063-a993310a9797