posix_clock.cpp should use sys/time.h (or time.h on Windows) rather than trying to define timeval itself; the existing definition was wrong for OSX (Issue #107)
Merge pull request #108 from steven-johnson/master

posix_clock.cpp should use sys/time.h
Embed OpenCL headers for simpler runtime build
Attempt to fix CL include build on Linux
Merge branch 'master' into nick-sandbox