export as a common js module

Useful for people wanting to use browserify/webpack

canvas2svg.js

@@ -1104,4 +1104,9 @@
     //add options for alternative namespace
     window.C2S = ctx;
 
+    // CommonJS/Browserify
+    if (typeof module === "object" && typeof module.exports === "object") {
+        module.exports = ctx;
+    }
+
 }());