Allowing users to see public tasks regardless of state.

Previously, non-owner/admins could only see tasks that
were in an open or closed state. Now the check just
confirms that the task is not in a draft state.

Fixes #424
Merge pull request #425 from DavidEBest/devel-taskviewer

Allowing users to see public tasks regardless of state.
more real-ish demo data
Merge branch 'devel' of github.com:18F/midas into devel-removevol
Merge pull request #427 from ultrasaurus/devel-demo

more real-ish demo data
Merge pull request #423 from DavidEBest/devel-removevol

Adding ability for owner/admins to remove volunteers from tasks.
increment to version 0.0.24
Merge branch 'devel' of github.com:18F/midas into devel-removevol