gauthierm/trac2github — pull request #3 by charleswaddell (2013-11-15 16:36:11+00:00)
Title: Allow for milestones with no due date.

Not all trac milestones have a due date (reprsented by 0) and GitHub
doesn't require one to be set. Before this change they were being set to
the start of Unix time in the export which was incorrect.