feat(router): add regex matchers

@petebacondarwin deserves credit for most of this commit.

This allows you to specify a regex and serializer function instead
of the path DSL in your route declaration.

```
@RouteConfig([
  { regex: '[a-z]+.[0-9]+',
    serializer: (params) => `{params.a}.params.b}`,
    component: MyComponent }
])
class Component {}
```

Closes #7325
Closes #7126

modules/angular2/test/router/integration/bootstrap_spec.ts

@@ -20,7 +20,12 @@ import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {Console} from 'angular2/src/core/console';
 import {provide, ViewChild, AfterViewInit} from 'angular2/core';
 import {DOCUMENT} from 'angular2/src/platform/dom/dom_tokens';
-import {RouteConfig, Route, Redirect, AuxRoute} from 'angular2/src/router/route_config_decorator';
+import {
+  RouteConfig,
+  Route,
+  Redirect,
+  AuxRoute
+} from 'angular2/src/router/route_config/route_config_decorator';
 import {PromiseWrapper} from 'angular2/src/facade/async';
 import {BaseException, WrappedException} from 'angular2/src/facade/exceptions';
 import {