Add emacs configuration

Basic support for working in R, some org mode and a theme.

diff --git a/emacs/.emacs b/emacs/.emacs
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+;; Added by Package.el.  This must come before configurations of
+;; installed packages.  Don't delete this line.  If you don't want it,
+;; just comment it out by adding a semicolon to the start of the line.
+;; You may delete these explanatory comments.
+(package-initialize)
+
+;; Mandatory theme, being from Leuven originally
+(load-theme 'leuven t)
+
+;; ESS - for working in R
+(autoload 'R-mode "ess-site.el" "Major mode for editing R source." t)
+
+(require 'ess-smart-underscore)
+(require 'auto-complete)
+
+;; org-mode support for R and LaTeX
+(org-babel-do-load-languages
+ 'org-babel-load-languages
+ '((R . t)
+   (latex . t)))
+
+;; Automatically switch to various modes
+(setq auto-mode-alist
+    '(("\\.mdwn\\'" . markdown-mode)
+      ("\\.md\\'" . markdown-mode)
+      ("\\.yarn\\'" . markdown-mode)
+      ("\\.js\\'" . js-mode)
+      ("\\.json\\'" . js-mode)
+      ("Makefile" . makefile-mode)
+      ("README" . markdown-mode)
+      ("NEWS" . markdown-mode)
+      ("COMMIT_EDITMSG\\'" . text-mode)
+      ("\\.html\\'" . html-mode)
+      ("\\.css\\'" . css-mode)
+      ("\\.yaml\\'" . yaml-mode)
+      ("\\.yml\\'" . yaml-mode)
+      ("\\.ick\\'" . yaml-mode)
+      ("\\.py\\'" . python-mode)
+      ("\\.R\\'" . R-mode)
+      ("\\.sh\\'" . shell-script-mode)))
+
+;; Enable the melpa archive for packages
+(require 'package)
+(setq package-enable-at-startup nil)
+(add-to-list 'package-archives
+             '("melpa" . "http://melpa.milkbox.net/packages/") t)
+(add-to-list 'package-archives '("org" . "http://orgmode.org/elpa/") t)
+(add-to-list 'package-archives
+             '("elpy" . "http://jorgenschaefer.github.io/packages/"))
+
+
+(custom-set-variables
+ ;; custom-set-variables was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ '(package-selected-packages
+   (quote
+    (leuven-theme lua-mode auto-complete ess-smart-underscore ess-R-data-view ess))))
+(custom-set-faces
+ ;; custom-set-faces was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ )
+
+