Merge pull request #6 from caseyg/master

site updates
initial changes for spring 2014
second commit

changed Participate page and added Guests page. Fall 2013 bleeds down
to the second paragraph of menus.
added image
edits in Participate

added picture, made list
updates for the call
edits for spring

added banner, changed info on About, added many pictures on Mission and
Participate, but no pic on FAQ. Made new layout called participate (to
keep banner out of Participate page)
changes for the call
Merge branch 'master' of https://github.com/ofZach/sfpc_site
add gem file