* inject_batch && commit_batch are no longer a part of journaldb
* get rid of redundant KeyedHashDB trait
* journaldb edition 2018
* journaldb trait moved to the lib.rs file
* making journaldb more idiomatic
* fix parity_bytes reexport
* rename parity-util-mem package in Cargo.toml file
* Run cargo fix on `vm`
* Run cargo fix on ethcore-db
* Run cargo fix on evm
* Run cargo fix on ethcore-light
* Run cargo fix on journaldb
* Run cargo fix on wasm
* Missing docs
* Run cargo fix on ethcore-sync
The `patricia_trie` crate is generic over the hasher (by way of HashDB) and node encoding scheme. Adds a new `patricia_trie_ethereum` crate with concrete impls for Keccak/RLP.
* Update `add_license` script
* run script
* add `remove duplicate lines script` and run it
* Revert changes `English spaces`
* strip whitespaces
* Revert `GPL` in files with `apache/mit license`
* don't append `gpl license` in files with other lic
* Don't append `gpl header` in files with other lic.
* re-ran script
* include c and cpp files too
* remove duplicate header
* rebase nit
rlp::decode returns Result
Make a best effort to handle decoding errors gracefully throughout the code, using `expect` where the value is guaranteed to be valid (and in other places where it makes sense).
