Implement runtime api client side directly in the runtime (#1094)

* Move `initialise_block` into `Core` trait as it is crucial calling the API functions

* Switch to first version of new runtime API implementation

* Fixes bug in tests

* Reenable asserts

* Directly use the `TestAPI` in the tests

* Start improving the api traits

:100644 100644 898aadc7 49217199 M	Cargo.lock
:100644 100644 61570436 465ed664 M	core/client/src/backend.rs
:100644 100644 5d0c886b 64d710fd M	core/client/src/block_builder.rs
:100644 100644 c447855e 5ecbe474 M	core/client/src/client.rs
:100644 100644 139cef13 f90dbf3d M	core/client/src/error.rs
:100644 100644 2800c503 3298e66a M	core/client/src/runtime_api.rs
:100644 100644 affa1c5c 809b08bc M	core/primitives/src/lib.rs
:100644 100644 2877dfa9 d5547413 M	core/sr-api/Cargo.toml
:100644 100644 9a49784d 6a625a03 M	core/sr-api/src/lib.rs
:100644 100644 7c28e1c7 a1a444a9 M	core/sr-primitives/src/traits.rs
:100644 100644 2e113ab6 dcc01a6d M	srml/metadata/Cargo.toml
:100644 100644 ea722a70 0809531a M	srml/metadata/src/lib.rs

* Refactoring

* Move `sr-api` into client and more refactoring

* Fixes tests

* Some documentation and cleanup

* Fixes compilation after rebase

* More refactoring and more documentation

* Makes `substrate-client` compilable on `wasm`

On `wasm` it basically just exports the runtime api stuff.

* Fixes grumbles

* Updates wasm files after rebasing the master

* Remove TODO comment

* Remove whitespaces

* Fixes after rebasing master

* Another rebase, another fix commit

substrate/node/cli/src/lib.rs

@@ -33,6 +33,7 @@ extern crate substrate_transaction_pool as transaction_pool;
 #[macro_use]
 extern crate substrate_network as network;
 extern crate substrate_consensus_aura as consensus;
+extern crate substrate_client as client;
 extern crate node_primitives;
 #[macro_use]
 extern crate substrate_service;
@@ -49,6 +50,7 @@ mod service;
 use tokio::runtime::Runtime;
 pub use cli::{VersionInfo, IntoExit};
 use substrate_service::{ServiceFactory, Roles as ServiceRoles};
+use std::ops::Deref;
 
 /// The chain specification option.
 #[derive(Clone, Debug)]
@@ -118,12 +120,13 @@ pub fn run<I, T, E>(args: I, exit: E, version: cli::VersionInfo) -> error::Resul
 	Ok(())
 }
 
-fn run_until_exit<C, E>(
+fn run_until_exit<T, C, E>(
 	runtime: &mut Runtime,
-	service: service::Service<C>,
+	service: T,
 	e: E,
 ) -> error::Result<()>
 	where
+	    T: Deref<Target=substrate_service::Service<C>>,
 		C: substrate_service::Components,
 		E: IntoExit,
 {