-add wrappers wps_data_load() and wps_data_init() so that other code doesn't need the structs for that
-change (and rename) gui_sync_wps_uses_albumart() to take points to be filled as parameter to get the AA size of a wps
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22139 a1c6a512-1295-4272-9138-f99709370657
* rename wps_engine to skin_engine as that was agreed on
* rename music_screen back to wps
* clean up the skin display/update functions a bit
* make skin_data_load setup the hardcoded default if a skin cant be loaded for whatever reason instead of doing it when it is first displayed
ignore any gui_wps or wps_ or gwps_ nameing in skin_engine/ ... these will be renamed as this work gets finished
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22135 a1c6a512-1295-4272-9138-f99709370657