Show milestone in packages

When a package is switched to the 'Finished' state, save the milestone of the
task the package is, into the package itself. This will help us knowing for
which milestone a package was built.
Merge pull request #137 from thescouser89/add_milestone_to_packages

Show milestone in packages
Display all the tasks sorted in ascending order by their names
Merge pull request #138 from thescouser89/sort_tasks

Display all the tasks sorted in ascending order by their names