Code review comment for lp:~wallyworld/launchpad/recipe-find-related-branches

I added functionality to limit the number of related branches displayed to 5 in each category. See screenshot for example of how it looks:

http://people.canonical.com/~ianb/recipe-related-branches3.png

The branches shown are the most recent according to the sorted_version_numbers() function:
- for related series, branches, the ordering is applied to the product series, and the devel focus is always shown
- for package branches, the ordering is applied to the distro series