Fixes for HandleQueuedPackageEdit

1. Updated the HandleQueuedPackageEditsTask to use normalized version of the package instead of plain version.
2. Merged the SendMailTask ( PR for it was sent and accepted already).
3. Added HandleFailedPackageEditsTask to send support request email for packages for which retry count has exceeded 3 on a daily basis.
4. Merging the changes to changelog.md from master.