altered path grid to fix issues that would happen when respawning was turned on,

accidentally forgot to remove a rocket launcher used for testing

more path grid changes: minor corrections, remembered to mark certain nodes as chokepoints.

multiple fixes: minor path grid adjustments. helicopter is now destroyed in a way that is more consistent with official maps. (note: the helicopter blades do not gib you, despite the fact that this would be consistent with official maps. this was an intentional choice on my part, and will not be altered)