some fixes for TFTD stairs
add gender ratios

defaults are 1:1 male:female, xcom ruleset puts it at 3:1
StoresMatrixState: remove redundant code
merge. kinda ... not really, in fact remove statStrings.

Merge branch 'master' of https://github.com/SupSuper/OpenXcom into oXc_kL
Conflicts:
	bin/data/Ruleset/Xcom1Ruleset.rul
	src/Battlescape/Pathfinding.cpp
	src/Ruleset/RuleSoldier.cpp
	src/Ruleset/RuleSoldier.h
	src/Ruleset/SoldierNamePool.cpp
	src/Ruleset/SoldierNamePool.h
	src/Savegame/Soldier.cpp