Increased muzzle velocity to counter inaccuracy when strafing at longer ranges (thanks to kravis for the feedback on Youtube).

See mod core's changelog

- Transfered GAU-8 fire mode configs to the mod core, for easier patching in the future
- See mod core's changelog for all other changes that were made

- Appropriate crediting added to mod.cpp --> Can be found in the expansions menu
- Updated server key and addon signatures (new name) --> Server owners will need to update their mod whitelist

Changed mod structure. Sound files are now containted in the mod core which will also be used by mods for USAF etc.

- Now supports all Firewill A-10 models!
- Reduced occlusion factor for most sounds from 0.5 to 0.4... we noticed that troops on the ground sometimes can't hear the plane (mostly when they're in a valley) even though the A-10 is quite close. This hopefully solves the issue.

Added missing addon signature

- Changed the mod from the USAF A-10C back to Firewill's A-10C yet again (might just support both planes at the same time or create seperate mods for them at some point)
- Changed magazine size to 1150 rounds
- Tweaked muzzle velocity of Firewill's 30 mm ammunition according to GAU-8 data I researched (rounds travelled way too fast before)
- GAU-8 is now on weapons group 1 and not on 4 with all the bombs and the targeting laser

- Turned internal idle engine sound down a bit
- Slightly increased 30 mm ammo damage
- Reduced the internal and external engine startup sound's length significantly to better match when the plane is actually ready to go
- Slightly increased the lower treshhold for internal g force related wind sound

- New external GAU-8 sounds by nicStage (https://freesound.org/people/nicStage/)
- Removed previously used 30 mm impact sounds because they sounded weird in most cases.
- Removed all changes to the ammo in general. It now has the standard properties as set by the USAF Mod.