Cabal feature request - dates in versions

[Einar Karttunen]

Hello

When developing a library I would like to have cabal files with
something like:

Version: 0.9.<date>

where Cabal would automatically generate the exact version based
on the current date (e.g. 0.9.20060422). This would be very useful
for development versions of libraries.

- Einar Karttunen