Check the max length of the package names

This way the first column will always be either 33 char of length or the
maximum length of the package names plus two extra characters.

Fixes https://bugzilla.redhat.com/1163070
Instanciate the openid_url variable
Improved way of finding the maximum length of the column as per @ralphbean's suggestion
Merge pull request #24 from fedora-infra/column_width

Column width