huge commit

- worked on about everything
- grid walker using plugable modules
- wifi models
- new distributions
- worked on geometric data-structures
- added typesafe timestamps
- worked on grid-building
- added sensor-classes
- added sensor analysis (step-detection, turn-detection)
- offline data reader
- many test-cases

sensors/pressure/BarometerData.h

@@ -0,0 +1,18 @@
+#ifndef BAROMETERDATA_H
+#define BAROMETERDATA_H
+
+
+#include <cmath>
+
+/** data received from a barometer sensor */
+struct BarometerData {
+
+	float hPa;
+
+	explicit BarometerData() : hPa(0) {;}
+
+	explicit BarometerData(const float hPa) : hPa(hPa) {;}
+
+};
+
+#endif // BAROMETERDATA_H