* Move blockchain::rocksdb into a separate crate

* Add license and description for blockchain-rocksdb

* Add support for crosslink tests

* Add support for registry updates test

* Refresh support for deposit operation

* Add support for attestation test

* Add support for attester slashing test

* Add BlockHeader tests

* Add support for proposer slashing tests

* Add support for transfer tests

* Add support for blocks and slots sanity test

* Add scripts to run state tests

* Fix script

* Fix test path change

* Refactor duplicate into code

* Upgrade lmd-ghost to newer blockchain version

* Implement ShasperBackend

* Upgrade to blockchain 0.7

* Implement commit and chain query interface for rocksdb

* RocksDB backend creation logic

* Add rocksdb invocation from commandline

* Update README and upgrade blockchain client to newer version

* Remove unfinished pruning lmd-ghost strategy

* Move substrate-specific crates to subfolder substrate

* Fix cargo lock

* Fix CI

* Check in runtime wasm file

* Expose proposer index and pubkey to executor

* Use importer even for self-built blocks

* Remove unused imports

* New block builder routine

* Switch to real bls implementation and properly sign all data structures

* Fix compile warning

* Add conditional compile for serde(skip)

* fix: ancestorQuery should never return None

* fix: lmd-ghost error types unification

* Make lmd-ghost properly set head

* Implement JustifiableExecutor for beacon block struct

* Replace BestDepthImporter with ArchiveGhostImporter

* Create archive lmd-ghost impl for simplicity

* Add blockchain executable directly built on top of libp2p

* Fix tests