[release] mdapi: 2.4

[Pierre-Yves Chibon]

Good Morning Everyone,

I just released a new version of mdapi: 2.4

Here is the corresponding changelog:
* Mon Feb 29 2016 Pierre-Yves Chibon <pingou(a)pingoured.fr&gt; - 2.4-1
- Update to 2.4
- Adjust copyright year
- Expand mdapi to return dependencies information (conflicts, enhances,
  recommends, suggests, supplements, requires, provides and obsoletes)
- Improve the cron script to retry after 30 seconds waiting, 3 times max if it
  fails to get info for a repo


Happy querying,

Pierre