HeatMap was not passing "name" argument to super, (and therefore not displaying the name on the LayerControl).

Author: Edwin Shin

folium/plugins/heat_map.py

@@ -40,7 +40,7 @@ def __init__(self, data, name=None, min_opacity=0.5, max_zoom=18,
         gradient : dict, default None
             Color gradient config. e.g. {0.4: 'blue', 0.65: 'lime', 1: 'red'}
         """
-        super(TileLayer, self).__init__()
+        super(TileLayer, self).__init__(name=name)
         self._name = 'HeatMap'
         self.tile_name = name if name is not None else self.get_name()