Implement a weather reading importer
Can find a weather reading between two dates
Code readers can do trees
Implement light hanging importer
Can find light hangings by the measurement time
Implement light string measurement importer
Schema changes
WIP row_importer
Weather reading raises exception
Use utc time constructor
Implement time range concern
Implement branch light placement import
Implement branch light measurement importer
Assigning nil if NA a method of row importer
Implement a crown perimeter importer