added another sample scene

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@922 bbaffbd6-741e-11dd-a85d-61de82d9cad9

samples/SampleScene3.scad

+difference() {
+	sphere(r=30);
+	translate([-50, -50, -100]) cube([100, 100, 100]);
+}
+
+translate([-30, 50, 0]) union() {
+	cube([140, 30, 10]);
+	translate([40, 15, 10]) rotate([0, 90, 0]) cylinder(r=10, h=60);
+}
+
+translate([80, 0, 0]) scale(1.2) union() {
+	difference() {
+		cylinder(r1=20, r2=5, h=20);
+		translate([-25, 30, -10]) rotate([60, 0, 0]) cube([50, 50, 50]);
+	}
+	difference() {
+		translate([0, 35, -21]) rotate([70, 0, 0]) cylinder(r=16, h=50);
+		translate([-50, -50, -100]) cube([100, 100, 100]);
+	}
+}
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