Move move .emacs.d out of configs/shared

Moving all of my Emacs-related files into their own directory at the root of
this repository.

emacs/.emacs.d/wpc/wpc-elixir.el

@@ -0,0 +1,13 @@
+;;; wpc-elixir.el --- Elixir / Erland configuration -*- lexical-binding: t -*-
+;; Author: William Carroll <wpcarro@gmail.com>
+
+;;; Commentary:
+;; My preferences for working with Elixir / Erlang projects
+
+;;; Code:
+(use-package elixir-mode
+  :config
+  (add-hook-before-save 'elixir-mode-hook #'elixir-format))
+
+(provide 'wpc-elixir)
+;;; wpc-elixir.el ends here