added new sanity checks and compile-time assertions to prevent errors

fixed stair-building issue
new test-cases
added elevator support
fixed/improved some walker modules

grid/walk/v2/modules/WalkModuleNodeImportance.h

@@ -4,6 +4,7 @@
 #include "WalkModule.h"
 #include "WalkStateHeading.h"
 
+#include "../../../../Assertions.h"
 
 /**
  * favor edges based on the importance-factor of the next node.
@@ -44,7 +45,6 @@ public:
 		(void) curNode;
 
 		const double prob = potentialNode.getNavImportance();
-		//return std::pow(prob, 10);
 		return prob;
 
 	}