Maxime Wack

Added a way to display bootstrap labels. Add `labels: [{text: "Label text", class: "Label class from {default, primary, success, info, warning, danger}, …]"` to a node to add labels with...

Thoroughly implemented a `hidden` state, with the corresponding methods and event handlers.

Fix cfw:org-get-timerange to display the correct timerange

2

Time ranges are not displayed correctly in calfw. This fixes kiwanami#124 and correctly displays time ranges in the calendar.