Update XLSForms to support the data models

[robsavoye]

The draft data models document specifies the types of humanitarian data, as well as the data points to collect. Not all of the models are map oriented. For the models that do have map data, there may be required data points not in the XLSForm. All the XLSForms in this library will need to be enhanced to support these models where possible.

[rsavoye]

The data models has been archived, with the only remaining one being the buildings XLSForm with entities support.