Lots of changes

	-> Added sluggable package
	new file:   app/config/packages/cviebrock/eloquent-sluggable/config.php

	-> Added login view
	new file:   app/views/users/login.blade.php

	-> Added color scheme
	new file:   colors.png

	-> divided main.styl
	new file:   public/css/stylus/includes/colors.styl
	new file:   public/css/stylus/includes/mixins.styl
	new file:   public/css/stylus/includes/vars.styl