added support for kodi texturecache:

- setting in addon settings to turn on the cache feature (now for testing, maybe hidden later)
- for all new items the poster and the fanart image will be cached automatically (when setting is on)
- added a option to the plugin root options to perform full cache fill which will pull every single image to the cache.

default.py

@@ -47,6 +47,10 @@ elif mode == "settings":
 elif mode == "manualsync":
     from LibrarySync import LibrarySync
     LibrarySync().FullLibrarySync(True)
+
+elif mode == "texturecache":
+    from TextureCache import TextureCache
+    TextureCache().FullTextureCacheSync()
     
 ##### BROWSE EMBY CHANNELS ROOT #####    
 elif  mode == "channels":