Improve help for emulate command
Appstore commands check if you are logged in

When user is not logged in our platform Appstore commands prompt him for Apple ID and password and after that show message "Not logged in". This is confusing as it seems apple credentials are incorrect. Add login page prompt before checking the id and password.

Fixes http://teampulse.telerik.com/view#item/280852
Merge pull request #602 from Icenium/fatme/improve-help

Improve help for emulate command
Merge pull request #604 from Icenium/vladimirov/appstore-login-order

Appstore commands check if you are logged in
Use latest fixes from common lib in order to use LiveSync USB protocol 3
Merge pull request #605 from Icenium/gospodinov/bumpLatestCommonLib

Use latest fixes from common lib in order to use LiveSync USB protocol 3
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
PR comments - fixes

Commands are executed only in case a project is found. Add ensureLoggedIn check in CordovaMigrationService before getting Cordova versions from the server. Update help with --path option. Add check for project type - only Cordova project is currently supported.