Merge pull request #159 from ModSquadWorkshop/visual_effects

Misc Changes
Fixing the Build
- I made the mistake of not running the game after I merged and of course I wound up committing broken code. Go figure.
Merge pull request #161 from ModSquadWorkshop/build_fix

Fixing the Build
Bug Fixes
- Fixed audio volume issues, you can hear the gunshots and whatnot now.
- Fixed bug that was causing the bullet spray to not work.
Bug Fixes 2: Electric Bugaloo
- Fixed a bug that was causing the shotgun to only fire a single bullet.
- Fixed bug causing explosions to deflect bullets (was really game-breaking for the shotgun).
- Shotgun now only emits one shell when firing instead of 10 (though I kind of liked how it was before).
- Re-balanced health drops to happen more often but to heal less health.
Bug Fixes
- Fixed bug that was intermittently causing the beam rifle to shoot itself.
- Increased the volume of the background music a bit.
Merge pull request #163 from ModSquadWorkshop/bug_fixes

Bug fixes
Perk Refactoring
- Refactored the perk system to fix a bug that was causing the speed perk to never go away.
Tweaks and Fixes
- Added the rocket launcher as a minion drop.
- Fixed a bug that was causing the player's shield to not disappear.
- Made special weapon drops more prevalent.
- Removed the lifetime option from PerkSpin, now only Perk handles when the perk objects disappear.
Merge pull request #164 from ModSquadWorkshop/bug_fixes

Perk Refactoring
Merge branch 'master' into visual_effects