Add listing view for TodoItems

- Pull in some moment.js magic to make dates humane
- Added new route for 'list'
create tag views

- New main nav element
- Tag listing view showing todo items
- Link from list view to go to tag view
- Tag overview showing all tags
remove experiment
link the number of tasks from the home view
use a span so that the dates don't fill the space

NOTE: I'd rather use text-error, etc. but that is not
  available in the deform_bootstrap version yet.
noted why javascript is being added to css slot
oops, converted to Class but didn't switch to self
change the way count and plural is handled
add actions to each task line