My emacs file, just getting started!

emacs.el

;; package.el setup and auto install on new machine
(require 'package)
(add-to-list 'package-archives
	     '("melpa" . "http://melpa.org/packages/") t)
(package-initialize)

(defvar local-packages '(auto-complete gotham-theme js2-mode markdown-mode pandoc-mode exec-path-from-shell projectile epc jedi))

(defun uninstalled-packages (packages)
  (delq nil
	(mapcar (lambda (p)
		  (if (package-installed-p p nil) nil p))
		packages)))

(let ((need-to-install
       (uninstalled-packages local-packages)))
  (when need-to-install
    (progn
      (package-refresh-contents)
       (dolist (p need-to-install)
	 (package-install p)))))

;; Disable toolbar, toogle colorscheme for graphical version of Emacs
(when (display-graphic-p)
  (set-default-font "Monaco 16")
  (tool-bar-mode -1)
  (load-theme 'gotham t))

;; Enable mouse in terminal
(require 'mouse)
(xterm-mouse-mode t)
(defun track-mouse (e))
(setq mouse-sel-mode t)

(setq backup-directory-alist
    `((".*" . ,temporary-file-directory)))

(setq auto-save-file-name-transforms
    `((".*" ,temporary-file-directory t)))

;; Set PATH env in GUI version on OS X
(when (memq window-system '(mac ns))
  (exec-path-from-shell-initialize))

;; Auto complete settings
(require 'auto-complete-config)
(ac-config-default)

;; Markdown / Pandoc Mode settings
(autoload 'markdown-mode "markdown-mode"
  "Major mode for editing Markdown files" t)
(add-to-list 'auto-mode-alist '("\\.text\\'" . markdown-mode))
(add-to-list 'auto-mode-alist '("\\.markdown\\'" . markdown-mode))
(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-mode))

(add-hook 'markdown-mode-hook 'pandoc-mode)

;; JS2-mode settings
(setq-default js2-basic-offset 2)

;; Python Dev settings
(require 'projectile)
(projectile-global-mode)

(require 'jedi)
;; Hook up to autocomplete
(add-to-list 'ac-sources 'ac-source-jedi-direct)
;; Enable for python-mode
(add-hook 'python-mode-hook 'jedi:setup)
(setq jedi:complete-on-dot t)