Shields now give a visual indicator of health by shifting towards a red color as the health gets closer to zero.
AI turrets will no longer give up in despair and not even try to kill people hiding in shields.
Adds weaker variant of the shield projector, with smaller radius and health more suited to one on one engagement verses the base shield being tuned for teamfighting.
Implements shields which block projectiles from outside, but allow projectiles to leave from inside.
Also adds a projector item which makes these, in two variants, rectangle and line. It was made an item so that down the road making stationary/wearable/etc versions will be easier as they can just contain the item.
Currently there is no way to obtain this without adminspawn. I have Future Plans(tm) for these.
