Implement an upcomming TCP/gRPC renderer in Angular Universal

[swaechter]

The Angular team published an interesting language-independent draft to offer render capabilities via TCP or gRPC. For more information see these links:

https://github.com/angular/universal/pull/999 https://github.com/angular/universal/pull/1000 https://github.com/angular/universal/pull/1001 https://github.com/angular/universal/pull/1002 https://github.com/angular/universal/pull/1003

This is really cool and the plan is to write a TCP/gRPC renderer and take advantage of the ls-router module to get all routes & use them in the Java middleware.

[swaechter]

A first experimental version can be found in the last few commits (Download the project, not yet in Maven central as snapshot release).