Bring in the changes from the 0.8.1 version of the Get the Image extension.  Full history of the code changes can be seen here: https://github.com/justintadlock/hybrid-core/commits/1.5/extensions/get-the-image.php
Minor updates to the readme.html file.
Updates for the 0.8.1 version. Includes changelog.
Version bump to 0.8.1.