WIP #120 Numeric state charts

lib/entity_class/other_entity.class.dart

@@ -0,0 +1,14 @@
+part of '../main.dart';
+
+class SunEntity extends Entity {
+  SunEntity(Map rawData) : super(rawData);
+}
+
+class SensorEntity extends Entity {
+
+  @override
+  int historyWidgetType = EntityHistoryWidgetType.valueToTime;
+
+  SensorEntity(Map rawData) : super(rawData);
+
+}