Add individual examples

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

examples/beamChain-4.scad

@@ -0,0 +1,16 @@
+// beamChain example 4
+
+include <Round-Anything-1.0.4/polyround.scad>
+
+function beamPoints(r1,r2,rStart=0,rEnd=0)=[[0,0,rStart],[2,8,0],[5,4,r1],[15,10,r2],[17,2,rEnd]];
+
+linear_extrude(1){
+
+  translate([0,-7*9,0]){
+    // Define multiple shells from the the one set of points
+    for(i=[0:2]){
+      polygon(polyRound(beamChain(beamPoints(2,1),offset1=-1+i*0.4, offset2=-1+i*0.4+0.25),20));
+    }
+  }
+
+}