180318

• Release: Battalion 1944 @marvinlehmann
• Release: Base Defense @hurdad
• Improved: Travis CI
  Builds now parallel halving test time
  Shellcheck test added
  now shows the which function files are called
• Updated domain to linuxgsm.com
• Rust: Improvements to handling of salt @UltimateByte
• Removed the which command for checking commands exist (only using command now)
• Various code improvements
• Added unreal4 engine to gsquery
• Added PAC3 mod for Garry's Mod @UltimateByte