* start on script
* Revert "Remove category filters"
This reverts commit d6e808e1a3.
* Convert categories to official default groups
* Add new users to default groups
* Rework group cards
* Cleanup
* Add unique bettors to contract and sort by them
* Most bettors to most popular
* Unused vars
* Track unique bettor ids on contracts
* Add followed users' bets to personal markets
* Add new users to welcome, bugs, and updates groups
* Add users to fewer default cats