This change added django-geojson which works well with django-leaflet and
allows for the display of a map in the django admin screen.

 Changes to be committed:
Registered new models	modified:   ndiaDjango/communityAssets/admin.py
The form for the map in Django Admin	new file:   ndiaDjango/communityAssets/forms.py
	modified:   ndiaDjango/communityAssets/models.py
Added the new requirement of django-geojson and removed jsonfields	modified:   requirements.txt