Add missing include <string> on SoundManager.h
Merge branch 'pierre' into develop

Conflicts:
	proj.ios_mac/HelloCpp.xcodeproj/project.pbxproj
	proj.ios_mac/HelloCpp.xcodeproj/project.xcworkspace/xcuserdata/Pierre.xcuserdatad/UserInterfaceState.xcuserstate
Merge branch 'feature/properties_components' into develop
Add doc and methods implementation to LightAttrComponent.
Add GeometryComponent initListeners() implementation
Add LightAttrComponent initListeners() implementation.