Use cordova 3.7.0 as experimental

Add new commands for easier checking of the supported framework versions and changing it in the project. The commands are mobileframework print (default one) and mobileframework set. Use the new server API and FrameworkVersion in order to show which versions are experimental.
Should be merged after https://github.com/Icenium/Ice/pull/2586

http://teampulse.telerik.com/view#item/279602


My idea was to have our own interface for this as the FrameworkVersion is from the autogenerated code and in case something is changed on the server, we'll have to update it. But I'll remove it and use Server.FrameworkVersion instead, no need of this duplicate code :)