add OctoRelay plugin

[borisbu]

please add the plugin to the Plugin repository

[jneilliii]

Please see comments below, mostly just related to wrong id for plugin repo submission. I do have one concern related to your default settings. It seems that you are linking directly to your github repo for image assets. Wouldn't it be better to include those in your plugin's static folder and link to them that way instead? I can assist you with what that URL would be if you would like to go that route.

[jneilliii]

I submitte PR #1 to your repo for a better way to handle the icons versus linking to github. I think once that's merged we should be good to go with approving this PR and getting you on the repo.

[jneilliii]

Just wanted to give you a heads up for future development @borisbu that you will want to publish a release on your github based on the current master branch, and then with future updates you modify the setup.py version number and release a new version in github and everyone with your plugin installed will get the updates as expected.