Add python support

http://tkf.github.io/emacs-jedi/released/#install
http://hackercodex.com/guide/python-development-environment-on-mac-osx/
Add dash-at-point for documentation
Add flycheck for Python
Add guidekey

Shows completion options for configured key commands (currently set up
with Magnar's defaults + C-c p (projectile) and C-c ! (flycheck))