Add backlog and create button

Refactor issue to have it's own controller.
Try to get pull label on issue.
Finish up showing the pull label.
Display details of assigned user.
Add class/object examples.
Use option2 for class structures for now.
Move issue controller into it's own file.
Update to a snapshot version of angular to fix bugs.
This fixes issues with ng-include inside ng-repeat.
Hack around timing issue with configuration.
For now this just hard codes an initial configuration.
Refactor issue columns to include cards as reusable controller.
Still more work to do, but this shows the idea.
Make IssueColumnCtrl an object and use "Ctrl as" form.
Add logic for showing and hiding backlog.
Needs styling improvements.
Add a create button at the top of the backlog.