feat(month-view): allow events to be dropped on the open day events list
feat(month-view): allow events to be dropped on the open day events list

Closes #523

mattlewis92/angular-calendar,mattlewis92/angular2-calendar,mattlewis92/angular-calendar,mattlewis92/angular-calendar,mattlewis92/angular2-calendar,mattlewis92/angular2-calendar,mattlewis92/angular-calendar