Added inSR parameter to satisfy MapServer REST specs.

In relation to my last pull request to get MapServer services working with FeatureLayers:
* Added the inSR parameter to satisfy the MapServer REST API [spec](http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#/Query_Map_Service_Dynamic_Layer/02r3000000z6000000/).

* Added a check for the features in the response to prevent errors.

* Rebuilt dist folder.

Meant to add this in last pull req, but got lost in the shuffle.