make calendar week start (sun or mon) configurable

view/tpl/event_head.tpl

@@ -39,6 +39,8 @@
 			events: '{{$baseurl}}/events/json',
 			header: false,
 			lang: '{{$lang}}',
+			firstDay: {{$first_day}},
+
 			eventLimit: 3,
 			height: 'auto',
 

view/tpl/settings.tpl

@@ -159,6 +159,7 @@
 							{{/foreach}}
 							</select>
 						</div>
+						{{include file="field_checkbox.tpl" field=$cal_first_day}}
 						<div class="settings-submit-wrapper" >
 							<button type="submit" name="submit" class="btn btn-primary">{{$submit}}</button>
 						</div>