Introduce ScreenMap trait for caching screen-coord queries.
Pull ActorMap back out into a trait.
Make ActorMap addition explicit.
Track actor positions in ActorMap.
Remove SpatialBins.
Don't recalculate Actor.Bounds each tick.
rename C&C to TD
save replays in per mod and version folders

StyleCop cleanups
install icons, desktop shortcuts and launchers in Makefile

avoid redundancy with package build scripts
add uninstall rules
separate RALint tests from regular builds
rename RALint → OpenRA.Lint
spaces to tabs
update documentation
apt-get update in before_install
never heal enemies

fixes #3597
separate Linux only shortcuts and icons from make install
Allies 05