Flag brew nvrs which are out of date compared to latest in brewweb.

For this to work, we need to add a cronjob that will do a GET to:

http://localhost:3000/packages/get_latest_pkgs_from_brew/-1?task_id=jb-eap-6-dot-2-dot-0&secret_key=birdistheword

Flagging will be done by highlighting the brew field yellow.

The huge disadvantage is that this process takes a lot of time and will block
any other requests made while the request above is serviced.
Merge pull request #56 from thescouser89/cron_cron

Flag brew nvrs which are out of date compared to latest in brewweb.
Minor performance improvement

Avoid getting brew info for packages that do not have their brew column
populated
Merge pull request #57 from thescouser89/cron_cron

Minor performance improvement