anchor.diff:  section#calendar
  +  //pre {{cal.owners|json}}
  +  //pre {{cal.reservations | json}}
     .row.mg-b-10
       .col-xs-2
         button.btn.btn-sm(type="button", ng-click="cal.prevMonth()",
  
positive.code:             ng-model="cal.date")
              option(value="{{cal.month()}}")
          .col-xs-3.text-left(ng-show="!cal.selection.selecting.year")
            span.big.bold(ng-click="cal.selectYear()") {{cal.year()}}
          .col-xs-3.text-left(ng-show="cal.selection.selecting.year")
            select.form-control.input-sm( ng-change="cal.selectYear();cal.display()",
              ng-options="option.format('YYYY') for option in cal.selecta('y') track by option.valueOf()",
  
negative.code:           ng-mouseenter="cal.adding(day)",
            ng-mouseup="cal.stopAdd()")
  
            .owner-box( ng-repeat="o in day.owners",
              ng-style="{'background-color': o.owner.color}")
            //pre.pull-left {{day | json}}
            span.pull-right.muted {{day.format("DD/MM")}}
            .text-center.day-editing(ng-mousedown="cal.startAdd(day)",
  