no cap on alien bases

guess i misinterpreted something a while back.
fix the base defense score in info view
un hard-code sprite armor selections
insert another draw routine

draw routine 15 now applies to aquatoids, the old 15+ got bumped up one
fix typo
fix wonky UFO doors
some fixes for TFTD stairs
add gender ratios

defaults are 1:1 male:female, xcom ruleset puts it at 3:1
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into WIP