Merge pull request #1 from railsbridge-boston/master

updating my fork
Added new dates, tweaked language a bit in the first few paragraphs
More language tweaks
Add a gray box around front page images - they're floating in the white background
Add a gray box around video iframe- it's floating in the white background
Merge pull request #85 from janetriley/master

Front page updates: next dates && phrasing