See if we can replace scheduler with visjs

[cecrs]

Issue Key: BAT-72
Issue Type: New Feature
Created: 01/Dec/17 7:03 PM
Updated: 02/Jan/18 7:07 PM
Resolved:
Description: It looks like http://visjs.org/timeline_examples.html gives us all the functionality we need (including nested groups) to replace fullcalendar scheduler - could you create a branch of BAT D8 and try it? Let me know if you run into any big roadblocks.

Here's a CDN link: https://cdnjs.com/libraries/vis
Comment1: 01/Dec/17 7:04 PM;557058:6023b735-a9a1-4569-8ba5-19759f061283;cc [~accountid:557058:7ad3cd33-98ca-446b-8be5-7d84e909e2f8]
Comment2: 01/Dec/17 7:14 PM;557058:6023b735-a9a1-4569-8ba5-19759f061283;btw the reason for doing this is because visjs is MIT licensed, no need for people to pay for a license and enter a key.
Comment3: