started removing KLib related code:

- assertions
- distributions
new helper methods
worked on stairs
worked on grid-walkers
worked on navigation

grid/walk/GridWalkRandomHeadingUpdate.h

@@ -4,8 +4,6 @@
 #include "../../geo/Heading.h"
 #include "../Grid.h"
 
-#include <KLib/math/distribution/Normal.h>
-
 #include "../../nav/dijkstra/Dijkstra.h"
 
 #include "GridWalkState.h"