Evil is the new vim emulator, add a recipe for it.

recipes/evil.el

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+(:name evil
+       :website "http://gitorious.org/evil/pages/Home"
+       :description "Evil is an extensible vi layer for Emacs. It
+       emulates the main features of Vim, and provides facilities
+       for writing custom extensions."
+       :type git
+       :url "https://git.gitorious.org/evil/evil.git"
+       :features evil
+       :depends undo-tree)