feat(core): speed up view creation via code gen for view factories.

BREAKING CHANGE:
- Platform pipes can only contain types and arrays of types,
  but no bindings any more.
- When using transformers, platform pipes need to be specified explicitly
  in the pubspec.yaml via the new config option
  `platform_pipes`.
- `Compiler.compileInHost` now returns a `HostViewFactoryRef`
- Component view is not yet created when component constructor is called.
  -> use `onInit` lifecycle callback to access the view of a component
- `ViewRef#setLocal` has been moved to new type `EmbeddedViewRef`
- `internalView` is gone, use `EmbeddedViewRef.rootNodes` to access
  the root nodes of an embedded view
- `renderer.setElementProperty`, `..setElementStyle`, `..setElementAttribute` now
  take a native element instead of an ElementRef
- `Renderer` interface now operates on plain native nodes,
  instead of `RenderElementRef`s or `RenderViewRef`s

Closes #5993

modules/angular2/src/facade/lang.ts

@@ -141,6 +141,9 @@ export function stringify(token): string {
   if (token.name) {
     return token.name;
   }
+  if (token.overriddenName) {
+    return token.overriddenName;
+  }
 
   var res = token.toString();
   var newLineIndex = res.indexOf("\n");
@@ -412,3 +415,15 @@ export function getSymbolIterator(): string | symbol {
   }
   return _symbolIterator;
 }
+
+export function evalExpression(sourceUrl: string, expr: string, declarations: string,
+                               vars: {[key: string]: any}): any {
+  var fnBody = `${declarations}\nreturn ${expr}\n//# sourceURL=${sourceUrl}`;
+  var fnArgNames = [];
+  var fnArgValues = [];
+  for (var argName in vars) {
+    fnArgNames.push(argName);
+    fnArgValues.push(vars[argName]);
+  }
+  return new Function(...fnArgNames.concat(fnBody))(...fnArgValues);
+}