Initial check in of the Guide issue #2584

Resolved issue of reference to PlayerIndex in MG XNA over MS XNA but requires two externs

ProtoBuild is not putting the second alias on the associated MG lib
Updated ProtoBuild to the updated version and rebuilt project.

Tested successfully, Guide now restored to WP project
Updated alias to include "gobal".  Seems the cleanest way to avoid changing other code.
Couldn't see an easy way in the protobuild config to have a separate reference map for just one platform.
This pattern also ensure other future splits can follow a working pattern
Merge pull request #2596 from DDReaper/Return_Guide_To_WindowsPhone

Return guide to windows phone