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

tests/geo/TestHeading.cpp

@@ -26,6 +26,16 @@ TEST(Heading, diff) {
 
 }
 
+TEST(Heading, mod) {
+
+	const float d = 0.0001;
+
+	Heading h1(+0);	h1 += 3.1415;	ASSERT_NEAR(3.1415, h1.getRAD(), d);
+	Heading h2(+4);	h2 += 3;		ASSERT_NEAR(7 - 2*M_PI, h2.getRAD(), d);
+	Heading h3(+0); h3 -= 3;		ASSERT_NEAR(2*M_PI-3, h3.getRAD(), d);
+
+}
+
 TEST(Heading, ctor) {
 
 	// OK