raw_images : 
	images from this folder are packed to the core resource pack
	by the scneario generator tool 
	see createCoreImages
	
raw_images_lobby 
	images from this folder are packed to the core lobby resource pack
	
raw_images_scenarios
	copied by the scenario generator tool (createScenario) to the scenarios dir under server_data
	(just)the maps should also be copied to the client scenarios dir : 
		"C:\games_ws\gbd-all\gbd-client\android\assets\scenarios\stonehenge1"
	future : deploy the scenario-specific data from server to client (via S3 ?)
	
raw_images_standalone
	not strictly required, the images are just copied from here to android\assets\core\img
