Further adjustments to parry mechanics.
Adjustments to how health/armor is auto-used. Now auto-used whenever possible rather than when armor/health is about to drop to zero.
Another pass of PNG optimization.
- Sounds and visuals done, only the actual firing effects left.
- While I was at it, touched up the library text again.
- Fixed the ammo fabricator sound being too loud, turns out I saved the lower
volume edit in the wrong folder.
