Site tweaks

Added MLH and tweaked CSS
pushed images to s3
Merge branch 'master' of https://github.com/yoavz/lahacks-site
updated to s3
get rid of console error
updated readme
emergency change of background
removed text references to LA
changed bg to griffith
removed comments
added faq
added a comment
hadar changes
duplicate sponsoring
removed annoying bullet point
changed fb like app id to lahacks mobile app id
incorrect url for image_src
fix fb meta image link?
meta img fix
merge heroku wierdnesS