Add individual examples

Having one example per file will make for a integration and there
live demo links with CadHub.
Resolves #29.

examples/mirrorPoints.scad

@@ -0,0 +1,10 @@
+// mirrorPoints example
+
+include <Round-Anything-1.0.4/polyround.scad>
+
+centerRadius=7;
+points=[[0,0,0],[2,8,0],[5,4,3],[15,10,0.5],[10,2,centerRadius]];
+mirroredPoints=mirrorPoints(points,0,[0,0]);
+linear_extrude(1)
+    translate([0,-20,0])
+    polygon(polyRound(mirroredPoints,20));