no more std::tr1 for C++11 (on OS X Mavericks)
no more std::tr1 for C++11 (on OS X Mavericks)
::fork() is in unistd.h
no more std::tr1 for C++11 (on OS X Mavericks)
no more std::tr1 for C++11 (on OS X Mavericks)
Merge branch 'tr1'
fixes for tr1 on OS X Mavericks