Merge tag 'v0.25.0' into archlinux

Alpha 25
Merge tag 'v0.26.0' into archlinux

Alpha 26.
Turret health 190 → 250, price 8 → 10. Armoury price 10 → 8.
Rework burning code. Fire spread should be a bit less aggressive.
Synchronize creep marks and creep effects (e.g. slow) via the config file "creepSize" value.
»give health <amount>« sets health to the given value.

This is my first non-C89-compatible commit to the gamelogic! Yay!
Rework alien health regeneration.

Heal rate changes:
- In the open:       1x (unchanged)
- Inside base:       2x (from 3x)
- Close to teammate: 2x (new)
- On actual creep:   4x (new)
- Close to booster:  8x (from 9x)
Update mac build scripts
Fix LTO compilation
Merge tag 'v0.27.0' into gameplay/testing
Fix a very stupid typo
Fix Cmd_RemoveCommandByFunc
Call FS::Initialize so the VM filesystem is intialized on VM startup
Fix /listmaps so it reports all availble maps instead of just the currently loaded map
Merge tag 'v0.27.0' into archlinux

Alpha 27
Bump version.
Force vm_game=2 in debian/unvanquished-server.default.
Merge branch 'master' into gameplay/testing
Debian client launcher script: set vm_game=2.
Fix some broken use of strncat.