OpenImageIO/oiio — pull request #271 by leavittx (2012-04-01 18:13:08+00:00)
Title: Add "check the time on the file to see if it's been updated since we last loaded" functionality for iv

Hi, Larry. This is my qualifying patch.
Now, if any of the loaded images being updated, it'll be reloaded from the disk when user switches back to it next time (not immediately).
Hope it will be accepted.