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/Cargo.lock

@@ -1786,7 +1786,6 @@ dependencies = [
  "safe-mix 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
- "sr-api 0.1.0",
  "sr-primitives 0.1.0",
  "sr-std 0.1.0",
  "sr-version 0.1.0",
@@ -1803,6 +1802,7 @@ dependencies = [
  "srml-timestamp 0.1.0",
  "srml-treasury 0.1.0",
  "srml-upgrade-key 0.1.0",
+ "substrate-client 0.1.0",
  "substrate-keyring 0.1.0",
  "substrate-primitives 0.1.0",
 ]
@@ -2566,16 +2566,6 @@ dependencies = [
  "unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "sr-api"
-version = "0.1.0"
-dependencies = [
- "parity-codec 2.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "sr-primitives 0.1.0",
- "sr-std 0.1.0",
- "sr-version 0.1.0",
-]
-
 [[package]]
 name = "sr-io"
 version = "0.1.0"
@@ -2789,6 +2779,8 @@ dependencies = [
  "parity-codec-derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sr-std 0.1.0",
+ "substrate-primitives 0.1.0",
 ]
 
 [[package]]
@@ -3060,8 +3052,9 @@ dependencies = [
  "parity-codec 2.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "sr-api 0.1.0",
  "sr-primitives 0.1.0",
+ "sr-std 0.1.0",
+ "sr-version 0.1.0",
  "substrate-consensus-common 0.1.0",
  "substrate-executor 0.1.0",
  "substrate-keyring 0.1.0",
@@ -3455,6 +3448,7 @@ dependencies = [
  "substrate-executor 0.1.0",
  "substrate-keyring 0.1.0",
  "substrate-primitives 0.1.0",
+ "substrate-state-machine 0.1.0",
  "substrate-test-runtime 0.1.0",
 ]
 
@@ -3468,12 +3462,12 @@ dependencies = [
  "parity-codec-derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
- "sr-api 0.1.0",
  "sr-io 0.1.0",
  "sr-primitives 0.1.0",
  "sr-std 0.1.0",
  "sr-version 0.1.0",
  "srml-support 0.1.0",
+ "substrate-client 0.1.0",
  "substrate-keyring 0.1.0",
  "substrate-primitives 0.1.0",
 ]