Better handling of URLs with invalid characters - like spaces
Remove debugging code and fix local URL checking.
Move to "ee2" folder for consistency with other add-ons
Add Grid compatibility
Adjust styling on "Visit URL" button
Update version number
Fix Matrix and Grid initialization
Fix ajax path to work on the front-end for Channel Form use
Validate required fields
Russian language
Restored DevDemon Updater compatibility

Still maintains convention of placing add-on under /ee2/ folder.
DevDemon's Updater add-on works fine with a directory structure of
/ee2/system/expressionengine/third_party/[add-on name]/ .