This PR pulls together some small adjustments as we near the conference. This is mostly ensuring that the relevant information isn't crowded out by no longer relevant information.
Updated main page to go to the Expo event page
Removed Requests for Proposals and Call for Posters from the sidebar
Renames "Sponsors" tab to "Expo"
Adds a Call to Action button on the Sponsors/Expo page for people to sign up
This PR pulls together some small adjustments as we near the conference. This is mostly ensuring that the relevant information isn't crowded out by no longer relevant information.