Dive into Code

function populateMarkers(url,type,data,datatype, markerCluster,bounds, markers,infowindow){
  /*
  url : the url link for ajax Call
  type: method post or get
  data: a dict {},
  datatype: xml or json,
  markerCluster instance,
  bounds: Googlemaps instance,
  markers: array,
  infowindow: google maps InfoWindow
  */
  $.ajax({
      url: url,
      type: type,
      data: data,
      datatype: datatype,
      success: function(data)
      {
        $('#loading').hide();
        markerCluster.minimumClusterSize = data.features.length;
        for (var i = 0; i < data.features.length; i++){
          marker = new google.maps.Marker({
              position: new google.maps.LatLng(data.features[i].geometry.coordinates[1],data.features[i].geometry.coordinates[0]),
              map: map

            });
           latlng = new google.maps.LatLng(data.features[i].geometry.coordinates[1],data.features[i].geometry.coordinates[0])
           bounds.extend(latlng);
           markers.push(marker);
           google.maps.event.addListener(marker, 'click', (function(marker, i) {
             return function() {
               infowindow.setContent("Name:"+data.features[i].properties.name+"</br>"+"Category :"+data.features[i].properties.category);
               infowindow.open(map, marker);
             }
           })(marker, i));
         }
         map.fitBounds(bounds);
         markerCluster.addMarkers(markers);
      }
  });
}

function populateSelectBox($element,url,method,data,datatype,display_field){
  /*
  $element: a jquery element for example $('#myselectbox')
  url : the url link for ajax Call
  method: method post or get
  data: a dict {},
  datatype: xml or json,
  display_field : the field name for display in selectbox <option value="pk"> display_field </option>
  */
    $.ajax({
      url: url,
      method: method,
      data: data,
      datatype: datatype,
      success: function(response){
        var data = JSON.parse(response);
        $element.html('');
        if (data.length != 0) {
          d = '<option value selected="selected">---------</option>';
          for (var i=0 ; i < data.length ; i++ ) {
            d += '<option value="' + parseInt(data[i].pk) + '">' + data[i].fields[display_field] + '</option>';
          }
        } else {
          d = '<option value selected="selected">---------</option>';
        }
        $element.html(d);
      }
    });
}

function populateGeometry(url,type,data,datatype, infowindow){
  /*
  url : the url link for ajax Call
  type: method post or get
  data: a dict {},
  datatype: xml or json,
  infowindow: google maps InfoWindow
  */
  $.ajax({
      url: url,
      type: type,
      data: data,
      datatype: datatype,
      success: function(data)
      {
          $('#loading').hide();
          for (var i = 0; i < data.features.length; i++){
  	     map.data.addListener('click', function(event) {
  		var myHTML = event.feature.getProperty("name");
  		var mytype = event.feature.getGeometry().getType();
  		infowindow.setContent("<div style='width:150px; text-align: center;'>"+myHTML+"</div>");
                infowindow.setPosition(event.latLng);
		infowindow.setOptions({pixelOffset: new google.maps.Size(0,-30)});
	        infowindow.open(map);
  	     });
    	     map.data.addGeoJson(data.features[i]);
  	 };
         var bounds = new google.maps.LatLngBounds();
         map.data.forEach(function(feature){
             feature.getGeometry().forEachLatLng(function(latlng){
                 bounds.extend(latlng);
              });
          });
          map.fitBounds(bounds);
      }
  });
}

Commands to update Ubuntu:

apt-get update  
apt-get -y upgrade 
apt-get -y dist-upgrade
apt-get -y autoremove

in urls.py

from .views import PageTemplateView  

and the urlpattern 

    url(r'^(?P<slug>[-\w]+)/$', PageTemplateView.as_view(),
        name='pages'),

in views.py 

from django.views.generic import TemplateView

class PageTemplateView(TemplateView):

    def get_template_names(self):
        templates = []
        template = 'pages/{}.html'.format(self.kwargs['slug'])
        templates.append(template)
        return templates


Then in  project root templates folder  create the folder with name pages. Add a static page for example contact.html  so the full path  is 'pages/contact.html'