* Update to alpha.8

* Update node/src/command.rs

* Update node/src/command.rs

* Update node/src/command.rs

* Update node/src/command.rs

Alpha.6 fixes

* Upgrade to substrate alpha.5 crates

* Start upgrading to alpha.6, node dir

* Update node files to match template

* Update runtime

* Fix up remaining errors

Update substrate to crates.io alpha release

Indices now optional: https://github.com/paritytech/substrate/pull/5025/files

* update runtime

* update node

* bump impl/spec

* update substrate & fix warnings

* impl version

* remove stray Cargo.lock

* explain

* initial CI

* should run on the same host

* try in one container

* try in one container 2

Register contracts rpc extensions