Apply patch for #9918.
Apply patch for #9859.
Added the possibility to define BOOST_CHRONO_LIB_CONSTEXPR at the command line. #9811.
Fix click_factor on 64 bits.
Make Stopwatches a sub-module of Chrono.
Move boost/chrono/stopwatches.hpp to Stopwatch module.
Fix json errors
Merge pull request #2 from danieljames/fix-json

Fix some json errors.
Merge branch 'develop' of https://github.com/boostorg/chrono into winrt