fix mem leak
fix up tftd tank draw routines
fix small glitch with built-in melee weapons
depend
UnitWalkBState::postPathProcedures() - rework CHARGING weapon

ProjectileFlyBState::init() - refactor intro.

Merge branch 'master' of https://github.com/SupSuper/OpenXcom into oXc_kL
Conflicts:
	src/Battlescape/BattlescapeGame.cpp
	src/Battlescape/UnitSprite.cpp
	src/Battlescape/UnitWalkBState.cpp
	src/Ruleset/MapScript.cpp
	src/Ruleset/MapScript.h