Disabled sponsor popups.

They were being active even when not visible. And clicking on some
places in the about section opening the links specified in that.

Disabled temporarily.
Disabled twitter.

It is not working. We'll put it back once we know how to fix it.
Limited the logo only to the home page.
Added sponsorshop prospectus link
Added more info about the venue.
Added a note to workshops and schedule.

Removed the mock schedule.
Fixed the links in nav.
Fixed other pages.