Add release date in output

[dolmen]

It would be useful to have the date of the release of the distribution displayed just after the distribution name. Prefered format: ISO 8601 (YYYY-mm-dd)

[dgl]

As @karenetheridge points out using the release date for sorting would also be good.

The tricky bit is where to get the date from, either the indexing process needs to start querying metacpan (could be useful for other things), or it uses the heuristic of the newest timestamped file in the archive (may actually work ok in most cases).

[karenetheridge]

The tricky bit is where to get the date from

The most reliable date of all (other than upload date to PAUSE) is going to be the timestamp on the .tar.gz file -- is that file still available for reference, or has it been thrown away after it was unpacked?