Add browserify support - Fixes #4777

src/Three.js

@@ -6,6 +6,11 @@
 
 var THREE = { REVISION: '68dev' };
 
+// browserify support
+if (typeof module === 'object') {
+	module.exports = THREE;
+}
+
 self.console = self.console || {
 
 	info: function () {},