Added Encode Email Plugin

Hey Ben,

I've tried to do a simple pull request but seems I have more modified files than I expected.  All I wanted to do was merge a few changes into the plugins.json file, but I also remerged your master branch to make sure I had the latest and it now looks like I am requesting several updates even though I believe most of them are already in your main repo.

Please let me know if I can correct anything, or if you know of a better way for me to merge changes!

Best,

Ben