* Rework the Client to support multiple concurrent requests

* Restore proc-macro functionnality

* More work

* More work

* More work

* Even more work

* Subscriptions working

* Dix docs

* More test fix

* Fix compilation

* More fixing

* I'm getting tired of semver

* Add a SubscriptionsClosed server event

* Don't attempt to send back response if connection is closed

* Implement into_subscription

* Refactor RawServer to return RawServerEvent

* Fix docs

* Wrap common::Notification around

* Rename ServerRequestParams to Params

* Fix tests

* Rename local to local_raw and add tests for rpc_api!

* Add the tests

* Fix doctests

* Fix doctests

* Properly support params in rpc_api!

* Respond with invalid param in case of parsing error

* RawServer::supports_resuming now returns a Result

* Add a local client/server

* Fix build and docs

* Fix doctest