Corrected an issue with VS2010 not supporting unordered_map.reserve()
Added a jenkins flag to the jamfile to help with xml output

Fixed a namespace issue for chrono on systems that don't have the <chrono>
header (msvc 2010)
Merge branch 'MSVC_build' of https://github.com/BoostGSoC/boost.afio into MSVC_build
Removed jenkins stuff from this branch