Hy language support in Atom

Adds syntax highlighting to Hy files in Atom.

This is a quick and dirty fork of language-python, with a bit of scraped Hy builtins.

It is mainly to demonstrate use of the Hy kernel for Jupyter with Hydrogen.

Likely, the entire grammar needs to be overhauled, perhaps inspired by an existing lisp like clojure.

Originally converted from the Python TextMate bundle.

Contributions are greatly appreciated. Please fork this repository and open a pull request to add snippets, make grammar tweaks, etc.