* Move hot & closing markets to All Markets
Soon to be named "Explore"
* Set up a question box on the homepage
* Show Leaderboards by default instead of Create
* Support full contract creation from homepage
* Force mt-0 on /markets
* Move description into info tooltip
* Add hint to ask a question
* Initialize close date to 1 week from today
* Add a promo section for logged-out users
* Add hashtags, remove mobile padding
* Rewrite promo copy
* Store hotContracts as static props
