Merge pull request #1 from lkuper/gh-pages

Update images
sponsorship info
update menu links
update contact
sponsors/index.html
index.html grammar
sponsor carousel
centering
jane st sponsorship logo
jet.com sponsor
job board
fix sponsor related style stuff
update hotels
update menu to include job board
logos
center sponsor logo
invited speakers section
add jump nav links to sponsor page
prettify speaker page
speaker bios