Use '--win' switch instead of '--store' for Windows desktop/tablet build

After additional discussion it is proposed to replace --store with --win as the most understandable for the developers and address future names/strings/terminology changes.

As a result we will have --phone and --win switches.

Pull request consists of two commits:
1. First one just replaces switch name
2. The second one goes further and reflects this change to project structure which is visible in build logs and if manually open platform in Visual Studio (for consistency reason) and to use Windows suffix in produced build artifacts:
before: 
    CordovaApp.Store_0.0.1.0_anycpu_debug
    CordovaApp.Phone_0.0.1.0_anycpu_debug
after: 
    CordovaApp.Windows_0.0.1.0_anycpu_debug
    CordovaApp.Phone_0.0.1.0_anycpu_debug