Add some more boilerplate code, perparing for database interface

	modified:   app/api/api.rb
	renamed:    app/models/doctor.rb -> app/models/api/doctor.rb
	renamed:    app/models/field.rb -> app/models/api/field.rb
	new file:   app/models/api/icd_entry.rb
	modified:   thin.pid
New concept for glueing API, InformationProviders and DB together

	modified:   app/api/api.rb
	new file:   app/helpers/database_adapter.rb
	new file:   app/helpers/information_interface.rb
	new file:   app/helpers/information_provider.rb
	modified:   thin.pid