router: starting galeb router integration
router/galeb: added creation methods to galeb client
router/galeb: added method to remove resource
router/galeb: move client to another package
router/galeb: add and remove backend methods
router/galeb: add and remove route methods
router/galeb: added final missing methods to implement router interface
router/galeb: convert urls in add/remove route to host:port
provision/docker: load galeb router in provisioner
router: support multiple routers of the same type with different configs