* Modify the thread pool of grpc server.
* add license header
* make param confingable
* Add sharing and Jaeger config.
* Remove grpc thread config from yml
* Make Jaeger receiver works in 12450 as default.
* Finish compile and codebase.
* Make codes runnable.
* Finish Jaeger query tests.
* Add document for jaeger receiver.
* Add readme.
* Fix a break link.
* Finish doc.