feat(facade/lang): add math and regexp support

modules/facade/src/lang.dart

@@ -1,6 +1,13 @@
 library angular.core.facade.lang;
 
-export 'dart:core' show Type;
+export 'dart:core' show Type, RegExp;
+import 'dart:math' as math;
+
+class Math {
+  static final _random = new math.Random();
+  static int floor(num n) => n.floor();
+  static double random() => _random.nextDouble();
+}
 
 class FIELD {
   final String definition;
@@ -58,3 +65,21 @@ class NumberWrapper {
   }
 }
 
+class RegExpWrapper {
+  static RegExp create(regExpStr) {
+    return new RegExp(regExpStr);
+  }
+  static matcher(regExp, input) {
+    return regExp.allMatches(input).iterator;
+  }
+}
+
+class RegExpMatcherWrapper {
+  static next(matcher) {
+    if (matcher.moveNext()) {
+      return matcher.current;
+    }
+    return null;
+  }
+}
+

modules/facade/src/lang.es6

@@ -1,4 +1,5 @@
 export var Type = Function;
+export var Math = window.Math;
 
 export class FIELD {
   constructor(definition) {
@@ -107,3 +108,24 @@ export function int() {};
 int.assert = function(value) {
   return value == null || typeof value == 'number' && value === Math.floor(value);
 }
+
+export var RegExp = window.RegExp;
+
+export class RegExpWrapper {
+  static create(regExpStr):RegExp {
+    return new RegExp(regExpStr, 'g');
+  }
+  static matcher(regExp, input) {
+    return {
+      re: regExp,
+      input: input
+    };
+  }
+}
+
+export class RegExpMatcherWrapper {
+  static next(matcher) {
+    return matcher.re.exec(matcher.input);
+  }
+}
+