Added some styles
Merge branch 'master' of https://github.com/camcross/rafiki

Conflicts:
	Gemfile.lock
	app/views/courses/index.html.erb
	app/views/layouts/application.html.erb
	app/views/subjects/index.html.erb
Styled home page
Merge branch 'master' of https://github.com/camcross/rafiki

Conflicts:
	app/views/home/index.html.erb
	app/views/subjects/index.html.erb
	app/views/user/index.html.erb
Styled Sessions
Merge branch 'master' of https://github.com/camcross/rafiki