Add pagination for tasks:
- update controller
- clean out old styles
- enhance tests and add new ones

- https://www.pivotaltracker.com/story/show/67751076
[Finished #67751076]
Updates based on PR comments
- #8
- https://www.pivotaltracker.com/story/show/67751076
[Fixes #67751076]
Merge pull request #8 from joshclick/paginate_tasks

Add pagination for tasks:
Create admin section:

- https://www.pivotaltracker.com/story/show/67751518
[Finished #67751518]
Updates based on PR comments
- #10
- https://www.pivotaltracker.com/story/show/67751518
[Fixes #67751518]