added game over and level reload to enemy code
partial fix for node system
merged gameover stuff to master
Update .gitignore

ignoring userprefs since they only track opened files in monodevelop anyways.
Delete robot_factory.userprefs

deleting existing userprefs
Merging back to make the node code accessible.
Solved some merge errors I foolishly introduced.
pushed new prefabs -
use the ones with the 'pf' prefix
included is a new 4-sided room

also organized the scripts folder a bit