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

math/Median.h

@@ -0,0 +1,43 @@
+#ifndef MEDIAN_H
+#define MEDIAN_H
+
+#include <vector>
+#include <algorithm>
+
+template <typename Scalar> class Median {
+
+private:
+
+	/** all scalar values in a sorted order (ascending) */
+	std::vector<Scalar> sorted;
+
+public:
+
+	/** add the given scalar value to the median calculation */
+	void add(const Scalar value) {
+
+		const auto idx = std::upper_bound( sorted.begin(), sorted.end(), value );
+		sorted.insert( idx, value );
+
+	}
+
+	/** get the median of all added values */
+	float get() const {
+
+		if (sorted.size() % 2 == 1) {	// odd
+
+			const int idx = sorted.size()/2;
+			return sorted[idx];
+
+		} else {						// even
+
+			const int idx0 = sorted.size()/2 - 1;
+			return (sorted[idx0] + sorted[idx0+1]) / 2;
+
+		}
+
+	}
+
+};
+
+#endif // MEDIAN_H