refactor - introduce config folder, and other misc changes

rack/print/yBar_P.scad

@@ -1,16 +1,5 @@
-include <../yBar.scad>
-
-include <../xBar.scad>
+use <../yBar.scad>
 
 // Oriented for 3d printing.
 // Supports required at XY wall connections, and depending on roundness
 yBar();
-
-
-*difference() {
-  translate(v=[2,0,0])
-  cube(size=[16,10,6], center=true);
-  hexNutPocket_N("m3", openSide = false, backSpace = 5, bridgeFront = true);
-}
-
-*hexNutPocket_N("m3", openSide = false, backSpace = 5, bridgeBack = true);