fixed default.jade file, !!! is deprecated
using redis to session storage
Fixed some code formatting inconsistencies
Mixed spaces -> tabs in public/views/header.html
mixed quotes -> single quotes in jade files
removed trailing spaces in head.jade
Merge branch 'session-redis' of https://github.com/carlosazaustre/mean

Conflicts:
	app/views/includes/foot.jade
	config/env/development.json
	config/env/production.json
	config/env/test.json
	config/env/travis.json
	config/express.js
	package.json
Merge https://github.com/joonho1101/mean

Conflicts:
	app/views/index.jade
	app/views/layouts/default.jade
	app/views/users/auth.jade
	app/views/users/signin.jade
	app/views/users/signup.jade
	config/env/all.js
	gruntfile.js
	public/views/header.html