fix tabs
adding faction granularity when reviving target units, fix angel cross commendation
rebase with master
add ccache detection for linux builds, off by default
update nike cross to include both kill and stun all aliens
fix bug where mercy or nike cross is erroneously awarded for instances where someone gets all the kills and someone else gets all the stuns in a single mission (supposed to be all aliens killed or stunned by single person)
fix src/CMakeLists.txt to include SoldierDiary code