feat(compiler): parse5 DOM adapter

Closes #841

tools/build/transformCJSTests.js

@@ -0,0 +1,16 @@
+var through2 = require('through2');
+
+module.exports = function() {
+  return through2.obj(function(file, encoding, done) {
+    if (file.relative.substring(file.relative.length - 8) == "_spec.js") {
+      var content = 
+      "var parse5Adapter = require('angular2/src/dom/parse5_adapter');\r\n"
+      + "parse5Adapter.Parse5DomAdapter.makeCurrent();\r\n"
+      + String(file.contents)
+      + "\r\n main();";
+      file.contents = new Buffer(content);
+    }
+    this.push(file);
+    done();
+  });
+}