added support for pillars

some new helper methods/classes

sensors/radio/model/WiFiModelPerFloor.h

@@ -14,6 +14,8 @@
  */
 class WiFiModelPerFloor : public WiFiModel {
 
+	static constexpr const char* name = "WiFiModelFlo";
+
 public:
 
 	struct ModelForFloor {
@@ -173,6 +175,8 @@ public:
 
 		}
 
+		Log::add(name, "loaded " + std::to_string(models.size()) + " floor models");
+
 	}
 
 	void writeToXML(XMLDoc* doc, XMLElem* dst) override {