Standardized location entrances and exits

The key for an object that shifts to another location is "transport",
and the key for an object that is the entry point for a location is
"entrance". This should remove some of the confusion between "entry" and
"exit".
Flagpole animations

(for end of level)

There seems to be this weird glitch where the detector for the flag
doesn't get detected until the player is far to the right, and then the
player's shifted too far to the left. Not sure what's happening there.