Added webservice method that returns town list

.. based on selected district
Added event log method
Added loading modifier to form control

.. Disables and fades the control
Added Town dropdown List

.. and added event logging
Added js-* classes to dropdowns

.. for cascading District and Town drop downs
Wired up District and Town dropdown fields
Added Event feature checkboxes

- Disabled access
- Disabled programme
- Green prescription
- Juinor programme