Temp reverts & issue fixes

(1) Fixed issue #39 and #47 about download button real estate on Disease & Phenotype pages. (Smaller and now inline.)
(2) Fixed responsive design on disease page (with added tab Pathways).
(3) Permanently changed info button colors. They are now a mix of the standard Bootstrap color and the blue link color. I honestly disliked the greenish-blue that Harry had used.
(4) Temporarily reverted fonts. I will change the text areas to be more readable in the next commit.