Replacing banned APIs Sleep and InitializeCriticalSection for Windows store and phone.
Updating to use BOOST_PLAT_WINDOWS_RUNTIME based on review feedback.
Adding missing include for boost\predef.h.
Merge pull request #4 from stgates/winrt

[winrt support] Replacing banned APIs Sleep and InitializeCriticalSection
Remove trailing whitespace.
Merge branch 'develop'