Add coordinates
Print asset's bearing in Vallu XML

While at it extract `calculateActualBearing` into dedicated object
Remove unused code
Adapt to XSD while commenting out not yet implemented specs
Remove not yet implemented element "modified timestamp"
Remove not yet implemented element "administrator code"
Remove not test element "comments"
Fix admin stop id element
Remove admin stop id element when source property is undefined
Remove stop code element when source property is undefined
Define function for retrieving actual property value
Remove names element when localized names are undefined
Remove localized name elements when they are undefined
Fix indentation
Reduce function visibility
Merge branch 'vallu-xml-elements-implementation'

Conflicts:
	src/test/scala/fi/liikennevirasto/digiroad2/vallu/ValluStoreStopChangeMessageSpec.scala