fix scale switching issues
maintain aspect on by default.
semi-fix window resizing during intro

works fine in software modes, but opengl seems to clear the screen on
resize, and FLC only updates the areas of the screen that change.
add some UFOExtender options

Stun Fest available via ruleset tweak
add some UFOExtender options:

no alien freakout messages
add some UFOExtender options:

Alien bleeding
Cleaning up installer
Cleaning up includes.

Conflicts:
	src/Engine/Flc.cpp
More mods more
How did that get there
try to make aliens a little more aggressive

weigh the escape decision lower if we're above half TUs, or if we're
levelling a charge.
turrets for living weapons
Fixed some Ufopaedia damage type issues.
Added sanity checks to installer
Merge remote-tracking branch 'upstream/master' into valgrind_fixes