Add link you changelog in the upgrade email report

[mitgib]

Would it be possible to add a link in the email report when an upgrade is preformed that links to changelog.txt ? I know I can find the changelog all on my own with a few clicks as well, but having it in that report would be fantastic to be able to just click it in my email.

I guess I am not able to post URL's but you get the drift.

[chirpy]

I'll add this for the next release.