<div class="row">
    <div class="col-xs-6" >
        <div class="row">
            <div class="btn-toolbar">
                <div class="btn-group">
                    <button class="btn btn-success" ng-click="changeView('agendaDay', 'myCalendar')">AgendaDay</button>
                    <button class="btn btn-success" ng-click="changeView('agendaWeek', 'myCalendar')">AgendaWeek</button>
                    <button class="btn btn-success" ng-click="changeView('month', 'myCalendar')">Month</button>
                </div>
            </div>
            <div ui-calendar="uiConfig.calendar" calendar="myCalendar" ng-model="eventSources"></div>
        </div>
        <div class="row">
            <div home-files project="project"></div>
        </div>
    </div>
    <div class="col-xs-6">
        <div class="row">
            <div home-samples project="project"></div>
        </div>
        <div class="row">
            <div home-notes project="project"></div>
        </div>
        <div class="row">
            <div home-reviews project="project"></div>
        </div>
        <div class="row">
            <div home-provenance project="project"></div>
        </div>
    </div>
</div>

<div class="row">
    <div class="col-xs-6" >
        <div class="row">
            <div class="btn-toolbar">
                <div class="btn-group">
                    <button class="btn btn-success" ng-click="changeView('agendaDay', 'myCalendar')">AgendaDay</button>
                    <button class="btn btn-success" ng-click="changeView('agendaWeek', 'myCalendar')">AgendaWeek</button>
                    <button class="btn btn-success" ng-click="changeView('month', 'myCalendar')">Month</button>
                </div>
            </div>
            <div style="padding-bottom: 16px;" ui-calendar="uiConfig.calendar" calendar="myCalendar" ng-model="eventSources"></div>
        </div>
        <div class="row">
            <div home-files project="project"></div>
        </div>
    </div>
    <div class="col-xs-6">
        <div class="row">
            <div home-samples project="project"></div>
        </div>
        <div class="row">
            <div home-notes project="project"></div>
        </div>
        <div class="row">
            <div home-reviews project="project"></div>
        </div>
        <div class="row">
            <div home-provenance project="project"></div>
        </div>
    </div>
</div>

Add some padding to align items.
Add some padding to align items.
