Extracted the original GetTicksCount64 de-cruft patch and rebased on boostorg/thread:develop.
Fixed breakage on MSVC.
Replaced tabs with spaces.
Merge pull request #20 from ned14/develop

Decrufted GetTicksCount64 patch. Fixed break of build on MSVC.
Merge branch 'develop' into winrt2

Conflicts:
	include/boost/thread/win32/thread_primitives.hpp
	src/win32/gettickcount64.cpp