added helper methods for debug printing

fixed issue when reading wifi entries within old walk files
worked on earth-registration
added corresponding test-cases
other minor changes

main.cpp

@@ -29,7 +29,10 @@ int main(int argc, char** argv) {
     //::testing::GTEST_FLAG(filter) = "*WiFiOptimizer*";
 
 
-	::testing::GTEST_FLAG(filter) = "*Offline.readWrite*";
+	//::testing::GTEST_FLAG(filter) = "*Offline.readWrite*";
+	::testing::GTEST_FLAG(filter) = "*Earth*";
+
+
     //::testing::GTEST_FLAG(filter) = "*Barometer*";
 	//::testing::GTEST_FLAG(filter) = "*GridWalk2RelPressure*";