* add spinner while pages are loading
* use a single publication for My Cards
* add Due Cards to the user menu
* add description to the All Users option for Due Cards
* some code clean-up
* Add cards due view
* Add input for selecting sort (not working)
* Add methods to `Utils` to save sort to local browser storage
* CSS updates to make lists display horizontally within swimlanes
* rename `findCards()` to `myBoards()`
* return model objects for Boards, Swimlanes, Lists, and Cards.
Previously created a data structure with limited properties.
* Sort the myBoards data structure according to the `sort` property
* add a `swimlane()` method in the cards model
* make the page more visually pleasing
* user +viewer to display Markdown in titles
* modify `colorClass()` in Lists model to return 'list-header-{color}'
* modify `colorClass()` of Swimlanes model to return 'swimlane-{color}'