comments
fix typo and add exception
audible feedback for unload
Merge branch 'master' of https://github.com/SupSuper/OpenXcom into oXc_kL

Conflicts:
	src/Battlescape/BattlescapeState.cpp
	src/Ruleset/AlienDeployment.cpp
	src/Ruleset/AlienDeployment.h
	src/Ruleset/Unit.cpp
	src/Ruleset/Unit.h
	src/Savegame/Base.cpp
	src/Savegame/Base.h
	src/Savegame/BattleUnit.h
ResourcePack::playMusic() - remove 'random' param

- sza_MusicRules chooses random or not, auto.