Added trophy collection!

Added trophy tracking variables in BirdCharacter BP.
Created new Trophy BP.
Added 3 trophies to collection test prototype for testing.
Added editable health and damage to destructibles
HUD Blueprint

So far have Mission, Ammo, and Altitude tracking in the HUD.
Added git plugin
Removed git plugin
Merge with master
Merge branch 'master' into iss76
Merge branch 'master' into iss103
Merge branch 'master' into DesignTeam