Add view-only mode

[hellmanhellman]

Good for if you only want to display the availability and not have people select it. Default is that it is editable. ex:

$("#weekly-schedule").dayScheduleSelector({

        interval: 60,
        startTime: '05:00',
        endTime: '24:00',
        editable: false
      });

[hellmanhellman]

I don't get why travis is failing, can someone explain?