Make order of parameters to DB more sensible.
Add LockDB wrapper and use it for DB.Memory's YoudoDatabase
Use IORef, not MVar, in DB.Memory.  (Use LockDB for thread-safety.)
Add comment about PostgresDB's non-thread-safety.
Fix layout in webdb
Remove superfluous MVar at top level.
Add DB.Postgres.youdoDB
Tweak format of running app in memory.
Delete superfluous import in WebApp
Add some convenience functions for evaluating relative to a URI.
Reify the notion of an API.
Make API into a functor.
Reify API version 0.
Improve comments in Web
Add a pun.
Don't shadow 'base'.
Replace RequestParsable with FromRequestBody
Add class FromRequestContext
Generalize WebResult to other monads than ActionStatusM
Flip 'report'.