move holes and helpers into seperate dir

holder for extruder and hexagonal screw mounts

helpers/Helpers.scad

@@ -0,0 +1,6 @@
+module roundedTriangle(length, sidewidth) {
+    render() difference() {
+        linear_extrude(length) polygon([[0,0],[sidewidth,0],[0,sidewidth]]);
+        translate([sidewidth, sidewidth, 0]) cylinder(r=sidewidth, h=length);
+    }
+}

helpers/Holes.scad

@@ -0,0 +1,22 @@
+M3HoleDiam = 3.4;
+M4HoleDiam = 4.4;
+
+M3NutDiam=6.01+.4;
+
+M3HeadDiam = 5.8;
+
+module M3Hole(thickness) {
+    rotate([0, 90, 0]) cylinder(h = thickness, d = M3HoleDiam);
+}
+
+module M4Hole(thickness) {
+    rotate([0, 90, 0]) cylinder(h = thickness, d = M4HoleDiam);
+}
+
+module M3Nut(thickness) { 
+    rotate([0, 90, 0]) cylinder(h = thickness, d = M3NutDiam, $fn=6);
+}
+
+module M3Head(thickness) {
+    rotate([0, 90, 0]) cylinder(h = thickness, d = M3HeadDiam);
+}