Added .gitattributes and license to readme.
To avoid name clashes with Boost.Thread, renamed boost::detail::win32 namespace to winapi. Also renamed the directory with headers accordingly. Adjusted Boost.Chrono and Boost.Sync to reflect the changes.

[SVN r85791]
Finished POSIX condition_variable, working on Windows.

[SVN r86007]
Boost.Sync: Added preliminary implementation of a waitable timer for fixed time point waits. Updated WinAPI functions to contain the required APIs.

[SVN r86179]
Fixed WinAPI compilation. Ported timed mutex to waitable timer. Windows time points are now aligned with FILETIME to reduce conversion overhead when used with waitable timers.

[SVN r86192]
Added support for WinAPI version specification.

[SVN r86307]
Changed the default WinAPI version to Vista.

[SVN r86389]
According to the discussion on the ML, changed the default WinAPI back to XP.

[SVN r86403]
Added Windows 8.1 (aka Blue) version constant.

[SVN r86409]
Added missing using declarations.

[SVN r86454]
Added missing using declarations.

[SVN r86455]
Removed RegisterWaitForSingleObjectEx as it is not present in all Windows SDK versions.

[SVN r86474]
Fixed INT_PTR_ spelling.

[SVN r86536]
detail changes for WinRT support
Removing MSOT copyright, replacing with Microsoft.
Updating macro for detecting WinRT to BOOST_WINDOWS_RUNTIME based on code review feedback.
Updating macro for detecting the Windows Runtime based on accepted changes adding a Boost.Predef.
To avoid name clashes with Boost.Thread, renamed boost::detail::win32 namespace to winapi. Also renamed the directory with headers accordingly. Adjusted Boost.Chrono and Boost.Sync to reflect the changes.

[SVN r85791]
Finished POSIX condition_variable, working on Windows.

[SVN r86007]
Boost.Sync: Added preliminary implementation of a waitable timer for fixed time point waits. Updated WinAPI functions to contain the required APIs.

[SVN r86179]