Revert "Revert "small update to twitter feed style, added tw link to about page""

This reverts commit e8c14e9ba58528d50ee187fca4eb600c34a9bea1.

Conflicts:
	app/assets/stylesheets/application.css.erb
	app/views/pages/home.html.haml
Revert "Revert "twitter gem, feed added to home, suggest url update, responsive css update""

This reverts commit 262824c4b7337ad18b315d018f5997a8641f9cad.

Conflicts:
	app/assets/stylesheets/application.css.erb
	app/views/pages/home.html.haml
remove trailing comma from twitter config, use upper-case env variables