The Yesod scaffolding, with branches for different versions.
If you want to send a pull request affecting all the different flavors, please send it as a pull request against the
postgres branch. The scripts we use for building the scaffoldings automatically merge changes from
postgres to all other branches.
If you have a patch which is backend-specific, please send a pull request to the appropriate branch, with a comment that this change applies only to the specific branch.