Documentation cleanup and fixes since cause-store migration
 * AuthLevel: Removed Vendor status from user auth level (status was moved to stores)
 * LoginAction: Removed Twitter login auctions (never implemented)
 * MediaImagePurpose: Removed cause banner and profile image contexts (functionality handled by cause's store)
 * Added new constants: MessageContext, NotificationType, PlanStatus, ProductStoreType
 * ProductStatus: Added missing status PERMANENTLY_REMOVED (that's how you delete things!)
 * StoreFlag: Renamed from StoreFlags (should not have been plural)
 * StoreType: Renamed status 2 to CAUSE (cause store type)
 * Client: Fixed putCauseById query type (was resource, should be controller)
 * Client: Fixed deleteUserAddressById query method (was PUT, should be DELETE)