Added Tiffani Bell

Test to make sure this is on the correct branch.
Merge pull request #589 from dschrimmer/patch-6

Added Tiffani Bell
Added Bracy, et al

Wendy Fong, Rhys Fureigh, Dan Getelman
Merge pull request #590 from dschrimmer/patch-8

Added Bracy, et al
Added Jeremia, et al

Drew, Cyd, David L., Jeff, Rebecca, changed Alan and Jake's titles, Ron Bouganim, Tim Wisniewski
Merge pull request #595 from dschrimmer/patch-9

Added Jeremia, et al
add tim wiseniewski bio image
Update index.html
Update index.html
Update index.html
Merge pull request #597 from codeforamerica/09-02-add-summit-speaker-bios

09 02 add summit speaker bios