Create a stable release of ImageCache for 6.x

It would be nice to have a stable release to provide site builders more certainty that the module will get an SA for any security issues. Please feel free to update this issue summary to include links to issues to fix prior to that release.

As of this post there seem to be 11 open critical bugs for 6.x-2.x-dev and only two open critical bugs for 6.x-2.0-beta12:

http://drupal.org/node/1164728
and
http://drupal.org/node/1200674

Thanks for your time!