added mentors to about us page
Merge remote-tracking branch 'origin/master' into mentors

Conflicts:
	about-us/index.html
fix a few links (there might be more broken ones)
fix some broken href" html
fix the rest of the incorrect HTML
finish cleaning up mentor profiles
David Paschich listed twice
fix Kevin Berry's info
use higher quality image crops where available
add twitter for richard yang
Merge pull request #24 from MissionBit/mentors

added mentors to about us page