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/angular1_router/src/ng_outlet.ts

@@ -200,7 +200,6 @@ function ngOutletFillContentDirective($compile) {
 
 
 
-
 function routerTriggerDirective($q) {
   return {
     require: '^ngOutlet',