Persists Meter Readings
Adds Meter Reading property setting to the UsagePointBuilder
Adds UsagePoint details view
Adds import of ReadingType from XML feed
Adds and refactors link processing and persistence of description only for ReadingTypes.
Adds unmarshaling of the argument field of ReadingType.
Adds unmarshaling of all ReadingType fields.
Extracts EntryLookupTable from UsagePointBuilder.