error.png CC BY 3.0 http://thenounproject.com/term/dead/78575/
loading.png CC BY 3.0 http://thenounproject.com/term/smile/71417/
error.png CC BY 3.0 Modified from http://thenounproject.com/term/smile/71417/
telescope_tutorial_thumbs_up.png CC BY 3.0 https://thenounproject.com/term/thumbs-up/40917/
telescope_tutorial_two_finger.png CC BY 3.0 https://thenounproject.com/term/tap-and-hold/13944/