Add note on how to improve function to group overlapping events
Add some defaults
Simplify the way a default event.end is set
Check for self.options.events.length before trying to iterate over them
Make sure to use  in place of  for consistency
Specify default date in default options object. Let self.day get set by self.drawDay()
surround special js term  in single quotes
Move bootstrap classes to SCSS file
Add option so that demo starts with tomorrow
Improve the event grouping function.

Instead of nested forEach loops that compare the array of currentGroup events against remaining events in the list, revise currentGroup to be an object with its own start and end properties, then compare events against that.