Add distance sensor, rewrite OLED to use new i2c library

main/include/control/ISensor.h

@@ -5,10 +5,13 @@
 #ifndef ISENSOR_H
 #define ISENSOR_H
 
+#include <vector>
+#include "SensorMessageBuilder.h"
+
 class ISensor {
 public:
     virtual ~ISensor() {}
-    virtual void get_reading() = 0; // todo: return a flatbuffer object
+    virtual std::vector<Flatbuffers::sensor_value> get_sensor_data() = 0;
 };
 
 #endif //ISENSOR_H