Create console stub for IE 9.

core/blockly.js

@@ -557,6 +557,14 @@ Blockly.getMainWorkspace = function() {
   return Blockly.mainWorkspace;
 };
 
+// IE9 does not have a console.  Create a stub to stop errors.
+if (!goog.global['console']) {
+  goog.global['console'] = {
+    'log': function() {},
+    'warn': function() {}
+  };
+}
+
 // Export symbols that would otherwise be renamed by Closure compiler.
 if (!goog.global['Blockly']) {
   goog.global['Blockly'] = {};