Deploy to Ellie button

[listrophy]

Similar to the "Deploy to Heroku" button.

Basically, allow for an image like:

<a href="https://ellie-app.com/deploy/github.com/username/reponame/blob/branchname/path/to/filename.elm">
<img src="https://ellie-app.com/deploy-button.png"/>
</a>

or

<a href="https://ellie-app.com/deploy/gist.github.com/username/gistID#filename">
<img src="https://ellie-app.com/deploy-button.png"/>
</a>

[lukewestby]

I think we can do this! People have been asking for it in various forms. I'll want to distill all the slightly different ideas into something that seems to work for most of the usecases. I do really like the idea of having a button like heroku does

[gampleman]

Although, how would you configure the packages?