Updated README now that the package is on MELPA.

Author: Brian Zwahr

README.md

@@ -4,3 +4,5 @@ This is an Emacs package that allows you to search [Packagist](http://packagist.
 from within Emacs.
 
 Simply install the package, then run `M-x emacsagist-search`. You can use tab/shift-tab, n/p, and j/k to navigate between links.
+
+Emacsagist can be installed via `M-x list-packages` or [Cask](http://cask.github.io) using the [MELPA repo](http://melpa.milkbox.net/).