Added map id support

Author: markmelnic

flask_googlemaps/__init__.py

@@ -22,6 +22,7 @@ def __init__(
         zoom=13,
         maptype="ROADMAP",
         markers=None,
+        map_ids=None,
         varname="map",
         style="height:300px;width:300px;margin:0;",
         cls="map",
@@ -58,6 +59,7 @@ def __init__(
         self.center = (lat, lng)
         self.zoom = zoom
         self.maptype = maptype
+        self.map_ids = map_ids,
         self.markers = []
         self.build_markers(markers)
         self.rectangles = []

flask_googlemaps/templates/googlemaps/gmapjs.html

@@ -1,7 +1,7 @@
 
 {%  if not is_googlemaps_loaded()  %}
     {% if GOOGLEMAPS_KEY %}
-        <script src="//maps.googleapis.com/maps/api/js?key={{GOOGLEMAPS_KEY}}&language={{gmap.language}}&region={{gmap.region}}" type="text/javascript"></script>
+        <script src="//maps.googleapis.com/maps/api/js?key={{GOOGLEMAPS_KEY}}&map_ids={{gmap.map_ids}}&language={{gmap.language}}&region={{gmap.region}}" type="text/javascript"></script>
     {%  else %}
         <script src="//maps.googleapis.com/maps/api/js?language={{gmap.language}}&region={{gmap.region}}" type="text/javascript"></script>
     {%  endif %}