Merge pull request #59 from MoosePoint/master

Add an Overview Map and a Home Button.
Added image parameters for dynamic layers to control which layers are visible by default.

Added support these additional layer types: GeoRSSLayer, KMLLayer, WebTiledLayer, WMSLayer, WMTSLayer.
Insert the necessary requires for the additional layer types added in the last commit. Each type has been tested.
Added grunt tasks to automate magnification to a dist folder and run a dev server + watch task.
Merge branch 'master' of https://github.com/DavidSpriggs/ConfigurableViewerJSAPI
Add ImageService Layer