* Introduce simple blockchain runtime for substrate tests.
* Remove bad files.
* Add needed wasm binaries.
* Refactoring.
- Repot files in test-runtime.
- Rename troublesome `Joiner::join` to `Joiner::and`.
- Rework `Slicable` to dedup code.
* More fixes and refactoring
* Rebuild substrate test wasm.
* Fix merge errors.
* Rename the disasterously named `to_vec` to `encode`.
Also rename `as_slice_then` to `with_encoded`.
* Tests for toy runtime.
* Fix doc nit
* client-api type and move duty roster types to primitives
* tuple implementation for slicable
* mild cleanup of deserialization code
* stubs which handle encoding and decoding themselves
* fancier impl_stubs macro
* zero-copy slicable API
* minimal polkadot-client API
* fix WASM API generation
* move native environment stuff to substrate executor
* fix warnings and grumbles
* BlockId in client interface
* Sync fixes and tests
* Updated to latest primitives
* Updated dependencies
* Updated for new (old) primitives
* Network as workspace member
* substrate-network
* Removed obsolete file
* begin_transaction on hash
Gav