sort headers in alphabetical order, move #include <stdexcept> after #include <limits>
add #include <windows.h> if on windows (since we are proposing to remove windows.h from platform.h in https://github.com/ros/roscpp_core/pull/99). the NOMINMAX definition in time.cpp is not changed
changes in this pull request:
#include <stdexcept>
after#include <limits>
#include <windows.h>
if on windows (since we are proposing to removewindows.h
fromplatform.h
in https://github.com/ros/roscpp_core/pull/99). theNOMINMAX
definition intime.cpp
is not changed