Manual migrations


@chreekat, Are we going to have any migration system? Or some way to add the citext extension? It just seems a little bit silly to have to handle case-insensitive keys manually in code if it can be done automatically by PostgreSQL (And I suppose we need manual migrations anyway; yesod automatic migrations aren’t a real solution, just a helper).

And in general, what’s your experience with manual migrations? Perhaps there’s some migration system you’d like to try?