Version 0.1.2

examples: use exit() instead of pthread_exit() from main thread.

OSX seems to spawn an extra thread for GLUT. As a result, we can't just call
pthread_exit() because there's still one thread left after we kill all the
threads we directly spawned, so the examples never stop running.

Signed-off-by: Drew Fisher <[email protected]>

Finally, a versioned release!