0.13.3.3 available on Tester's Branch

[h2]Changelog[/h2]

New Features:
- Added 1x, 3x, and Unlimited countermeasures gameplay setting

Bugfixes:
- Selected loadout preserved between instant action missions

JSON:
- "Flyables.json" file added to root of mod directory
  + Defines which aircraft are flyable (should allow mod aircraft to be flyable without cheat)