* Remove nonsense code and options, fix score and generally make subkey work.

* Rename Demo -> Node

* Add Assets module

* Fixes

* Fix

* Update comments

* Support `GenesisConfig` without any fields

Fixes: #923

* Do not generate an empty `GenesisConfig`, instead generate no `GenesisConfig`

 - move ImportBlock, BlockOrigin, ImportResult into shared sr-primitives
 - let Consensus provide  and  traits again
 - update consensus traits to latest development
 - implement traits on client::Client, test_client::TestClient
 - update RHD to use the new import_block API

* Move `chain_spec` into `node-cli`

* Fixes tests

* Adds `construct_simple_service` and `construct_service_factory` macros

* Remove the `node-service` crate

* Add some documentation

* Fixes compilation on stable

* moved DigestItem impl to impl_outer_log

* Enable backtrace collecting on the CI

* internal module is not required in impl_outer_log

* Revert "internal module is not required in impl_outer_log"

This reverts commit 54304469.

* Revert "moved DigestItem impl to impl_outer_log"

This reverts commit 8872bbee.

* Revert "Revert "moved DigestItem impl to impl_outer_log""

This reverts commit 47afd596.

* Revert "Revert "internal module is not required in impl_outer_log""

This reverts commit 9ae64001.

* More diagnostics

* check if only 1 test fails

* test is back + some "traces"

* removed some traces

* removed "traces"

* Implement a non generic version of child delta trie

* Use delta_trie_root in state_machine

* Expand InMemory backend to support multi-storage

* Create Consolidate trait

* Fix all crate compile and remove unused OverlayedChanges::drain

* Implement child storage root support and overlay changes

* Add child storage reader

* Add child storage writer

* Implement child storage cleaning

* Fix light backend compile

* Add all required ext functions for wasm executor

* Add ext def to io

* Add all io functions

* Fix nostd compile

* Add simple test

* Remove unnecessary vec copy in child_storage_root_transaction

* Use values_mut/for_each to make it shorter

* Use extend to shorter a for loop

* Move record_all_keys to trie so it's easier to generic them later

* space -> tab

* Remove to_owned in debug format

* Clean out all to_owned

* Break debug_trace to multiple lines

* Remove 0..

* UserError copy/paste typo

* Replace Vec::from_raw_parts by slice::from_raw_parts

* Use iter::empty()

* Wrap some long lines

* Wrap a missing line

* Remove unnecessary map

https://github.com/paritytech/substrate/pull/856#discussion_r226222663

* Call ext_free after from_raw_parts

* Fix tests in other crates