many changes and updates

- changed the wifi-estimation api
- adjusted test-cases
- worked on grid-bulding and grid-importance
- new walking modules
- fixed some minor issues

tests/sensors/pressure/TestBarometer.cpp

@@ -57,7 +57,7 @@ TEST(Barometer, relCalib) {
 
 #include <fstream>
 
-TEST(Barometer, tendence) {
+TEST(Barometer, LIVE_tendence) {
 
 	std::ifstream inp ("/tmp/baro1.dat");
 
@@ -81,7 +81,7 @@ TEST(Barometer, tendence) {
 
 }
 
-TEST(Barometer, tendence2) {
+TEST(Barometer, LIVE_tendence2) {
 
 
 	const float timeframe = 5.0;