- Fixed a number of issues with PoI model definition.
- Added a new file (pois.txt) which contains a simple format for defining
  points of interest.
- A function has been added to setup.py to parse this file and add them to
  the database. (Another function to fix up links has been defined, but
  has not been completed).
- GetPossibleEntryPoints has been defined in Trails.html. I still need
  to find out how to use the 'url' tag to get Django to fill in the
  corrent url for me.
- The post call for markers for the map has been rewritten in the
  process of getting it to work. I'll check later if I can change it back
  to the old version.
- Trails_GetPossibleEntryPoints has been finished and is now working. It
  required some refactoring.
- The map on the Trails page now loads markers correctly.
- Map_ViewTrailById has been fixed up to correct mistakes, and change things
  to fit with json serialization in Python.
- Added missing 'load' directives in MapView.html
- Fixed typo in jsmodel.MapDataModel