Ajout de providers

Ajout des providers suivant : 
Google Maps - Satellite
Google Maps - Terrain
Google Maps - Altered roadmap
Google Maps - Relief
Google Maps - Hybrid (satellite + annotation)
ArcGIS ChinaOnlineCommunity_Mobile
ArcGIS ChinaOnlineCommunityENG 
ArcGIS ChinaOnlineCommunity
ArcGIS ChinaOnlineStreetGray
ArcGIS ChinaOnlineStreetPurplishBlue
ArcGIS ChinaOnlineStreetWarm
ArcGIS ChinaBoundaryLine
ArcGIS Imagerie
ArcGIS Terrain
ArcGIS World Street Map
ArcGIS Imagerie Clarity
ArcGIS Imagerie FireFly
ArcGIS World Shaded Relief
ArcGIS World Transportation
ArcGIS World Boundaries and Places