some fixes [multithreading,..]

needed interface changes [new options]
logger for android
wifi-ap-optimization
new test-cases

tests/grid/TestStairs.cpp

@@ -25,6 +25,8 @@
 
 // ENSURE UNIQUE CLASS NAME
 struct MyNode345092134 : public GridPoint, public GridNode {
+	float walkImportance = 0;
+	float getWalkImportance() const {return walkImportance;}
 	float navImportance = 0;
 	float getNavImportance() const {return navImportance;}
 	MyNode345092134() {;}