V2 beta 1

[jwasilgeo]

@tomwayson please review. This picks up from your original work on v2-beta-1 (awesome stuff!!), and includes changes to resolve #190, #191, #192, and #195. As far as big changes that need some review for sure:

• esri.map doesn't exist anymore --> changed to esri.directives
• changed the isolate scope properties for directives
  • The map view and scene view all get isolate "view-options", which works great for scene views but is still mysteriously not working right for map views. In the case of a map view, we still use your original safety checks for the initial extent, but any other valid JSAPI properties like rotation, center, zoom, etc. are not applied to the map view during the setMap method.
• esriHomeButton also is a little different, but certainly inspired by, your original home button example

[tomwayson]

excellent work @jwasil.

I ended up reverting f49f4e5 for the reasons listed in 821a337.

resolves #190
resolves #191
resolves #192
resolves #195

[jwasilgeo]

Thanks for the final review and updates! Were you also able to see how the esriMapView doesn't really like to accept bound "view-options", whereas the esriSceneView seems to be ok with it? It is creeping me out.