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/MACAddress.h

@@ -59,7 +59,7 @@ public:
 
 	}
 
-	/** convert to hex-string ("xx:xx:xx:xx:xx:xx") */
+	/** convert to lower-case hex-string ("xx:xx:xx:xx:xx:xx") */
 	std::string asString() const {
 
 		std::string str = ":::::::::::::::::";
@@ -85,6 +85,11 @@ public:
 		return o.asLong() == asLong();
 	}
 
+	/** not equal? */
+	bool operator != (const MACAddress& o) const {
+		return o.asLong() != asLong();
+	}
+
 private:
 
 	/** convert the given hex char [0-F] to an integer [0-15] */