Add to MELPA

[aaron-em]

Would be nice to have this available via the package manager; especially for those of us who share ~/.emacs.d across multiple machines, it's easier to deal with keeping package installs in sync than to do the same with random git repos.

Since there's already one open PR since December 2014 on the repo, I'm hesitant to put the effort into submitting a PR with a MELPA recipe et cetera. If this issue gets some interest from the current maintainer, such that I know my effort won't go to waste, then I'll turn this issue into a PR.

Thanks!