rename handlers to /WebsiteProvider/
rename handlers to /WebsiteProvider/

fixes problem reported in https://github.com/StarcounterPrefabs/Website/pull/32#issuecomment-279684075

StarcounterApps/Website,StarcounterApps/Website,StarcounterApps/Website,StarcounterPrefabs/Website,StarcounterPrefabs/Website,StarcounterPrefabs/Website