[453701] Add support for Windows Phone 8 platform

Initial support for Windows Phone 8 platform. It does not contain
Windows Phone 7.X support because this system is no longer supported. It
contains set of basic features to create, launch and export native wp8
applications. I have tried to avoid any 3rd party tools for accessing
Windows registry. In result, it uses reg command instead.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=453701
Change-Id: Ic0b6732e85bab0bf8845cbe1643b53a862815bfb
Signed-off-by: wgalanciak <wojciech.galanciak@gmail.com>
For now I had only a chance to verify it with 3.6.3 and 3.6.4 and this is a reason why I have added it only for 3.6.3. If you think that it is necessary for the initial release I can spend some additional time on testing older versions.