handle Success status better      * added missing 204 to successstatuses.     * this is to make library handle success better because some service will return 204 status by default.
handle Success status better
     * added missing 204 to successstatuses.
    * this is to make library handle success better because some service will return 204 status by default.

flowjs/flow.js,Symplicity/flow.js,flowjs/flow.js