Addressing feedback from Rene Rivera for adding BOOST macros for detecting the Windows Runtime being targeted.
Now there are new predefs for desktop, store, phone, and the Windows Runtime (store/phone) in general.
These can easily be used throughout Boost to detect the Windows platform being targeted.
Adding missing newlines at the end of a few files.
Merge pull request #5 from MSOpenTech/winrt

[winrt support] Adding predefs for testing and checking the Windows Runtime being targeted.