Added in the final part of the trench run.
Changes from sync applied.
Played around with the homing rotation speed a little for the L2 and L4 homing missiles.

Also Re-Added those folders that got lost.
Made some tweaks to the trench in the second half of the level + Fixed the timing for the bomber ships.
Merge branch 'master' into L4DEV

Conflicts:
	Library/assetDatabase3
	Library/guidmapper
	Library/metadata/c7/c75f98769577fe24a8b13c7ca51d4dd2
Tweaks

Slower trench sequence
turrets don't fire so fast or quickly
engineering to call up the trench scene as a Wave, not have to time it
Trench objects are now separate from the background scroll
Again, forgot to remove debug statements