Fix accidental link in haddock documentation.
Split DB stuff out of YouDo.Types and into YouDo.DB
Move declarations for parsing from Types to Web
Escape angle brackets in Haddock documentation.
Remove superfluous argument to dbResourceName.
Haddockize YouDo.DB
Split source trees for more efficient compilation.
Fix DueDate JSON: use Null for Nothing; report parsing errors.
Add YouDo.TimeParser and make use of it.
Add a couple more tests of misformatted data.
Add type synonym ActionStatusM
Send HTTP status 415 (Unsupported Media Type) when appropriate.
Send HTTP status 409 (Conflict) for concurrent modification.
Add lift500, abbreviating failWith internalServerError500
Reference RFC 2616 for HTTP status codes.