Add deploy-to-tsuru script, README tweaks

This adds a shell script called `deploy-to-tsuru`, that uh, deploys to tsuru.

And then I reference it in `README.md` and made a few other tweaks.

Here's what the output of `deploy-to-tsuru` looks like: https://gist.github.com/msabramo/164f1bdbbd3c56d59df6
@msabramo it is a very cool idea. I think that you can create a `tsuru plugin` to clone from github (or something like it) and deploy to tsuru. There is a documentation page about how to extend the tsuru client with plugins: http://docs.tsuru.io/en/latest/using/cli/plugins.html