Provide the ability to attach custom data onto a route and retrieve
that data as an injectable (RouteData) inside the component.
Closes#2777Closes#3541
This change also makes us compliant with 1.6.0-dev compiler,
so we can do some experiments with apps that use 1.6 features
and compile against Angular.
We should probably add a travis build for 1.6 so we stay compatible
with both versions.
Note that this also removes the `components` option from `RouteConfig`.
This functionality will be reintroduced with the more general `//` routing.
See #2329 for more details.
