feat(di): Add the @Injectable annotation to Compiler

Mark `Compiler` and its dependencies as available to the `Injector`.

modules/angular2/src/change_detection/parser/lexer.js

@@ -1,3 +1,4 @@
+import {Injectable} from 'angular2/di';
 import {List, ListWrapper, SetWrapper} from "angular2/src/facade/collection";
 import {int, NumberWrapper, StringJoiner, StringWrapper} from "angular2/src/facade/lang";
 
@@ -8,6 +9,7 @@ export const TOKEN_TYPE_STRING     = 4;
 export const TOKEN_TYPE_OPERATOR   = 5;
 export const TOKEN_TYPE_NUMBER     = 6;
 
+@Injectable()
 export class Lexer {
   text:string;
   tokenize(text:string):List {