Tweaked cylc-list logic.
Merge pull request #349 from arjclark/cylc-list-fix

Tweaked cylc-list logic.
Removed some obsolete imports from dbchooser.
Merge branch 'master' of github.com:cylc/cylc
Updated the change log.
Plot naked dummy tasks in namespace graphs.

Closes #338.
Merge pull request #354 from hjoliver/338-graph-naked-dummy-tasks

Plot naked dummy tasks in namespace graphs.
Merge branch 'master' into localhost-not-remote