Merge pull request OpenApoc#196 from Istrebitel/master

- vehicle weapon disable controls
- vehicle weapon ammo display
- groundwork for proper ufo incusrions and missions done
- vehicles properly checking los when deciding wether to maneuver around
target
- vehicles properly aiming at ground vehicles's centre
- vehicles fire guided munitions when not in firing arc
- vehicles check vertical firing arcs properly
- one case of vehicles deadlocking fixed
- loot no longer stored if no containment at all present on vehicle

Appveyor: Add portable.txt to more than just debug package

Merge pull request OpenApoc#138 from JonnyH/WIP/portable-appveyor

Appveyor windows CI fixes

Start of something beautiful - hopefully