Trench start engineering
Balance, etc. changes.
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
Merge branch 'master' into L4DEV

Conflicts:
	Assets/Resources/Scenes/Level_4/L4_Spawner.cs
	Assets/Resources/Scenes/Level_4/Level_4_Boss.unity
	Library/assetDatabase3
	Library/guidmapper
	Library/metadata/c7/c75f98769577fe24a8b13c7ca51d4dd2
	ProjectSettings/TagManager.asset
L4 Balance

Made player slower thru trench
Made turrets shoot more slowly, with bullets that travel slowly as well
Merge branch 'L4DEV'

Conflicts:
	Library/assetDatabase3
	Library/metadata/c3/c300e8116af92b443af24cc3bcabd6e7
Stuff (Unity things)