Added music class
Added Music loader
CherryPicked commit "Reworked ResourceLoader"

Conflicts:
	src/Nazara/Utility/Loaders/MD2/Loader.cpp
Fixed some leaks
Fixed music looping
Merge remote-tracking branch 'origin/Audio-update'

Conflicts:
	include/Nazara/Core/ResourceLoader.hpp
	include/Nazara/Core/ResourceLoader.inl
	src/Nazara/Audio/Loaders/sndfile/Loader.cpp
	src/Nazara/Audio/Sound.cpp
	src/Nazara/Utility/Loaders/MD2/Loader.cpp
	src/Nazara/Utility/Loaders/MD5Anim/Loader.cpp
	src/Nazara/Utility/Loaders/MD5Mesh/Loader.cpp
	src/Nazara/Utility/Loaders/PCX/Loader.cpp
	src/Nazara/Utility/Loaders/STB/Loader.cpp