Makes image rotation work when imagerotate() is missing from your GD.
Report any issues at the github issue tracker: https://github.com/alfreddatakillen/wp-imagerotate/issues
Read more about GPLv2 here: http://www.gnu.org/licenses/gpl-2.0.html
If we meet some day, and you think this stuff is worth it, you may buy me a beer in return. (GPLv2 still applies.)