* Start adding interop genesis state to lcli
* Use more efficient method to generate genesis state
* Remove duplicate int_to_bytes32
* Add lcli command to change state genesis time
* Add option to allow VC to start with unsynced BN
* Set VC to do parallel key loading
* Don't default to dummy eth1 backend
* Add endpoint to dump operation pool
* Add metrics for op pool
* Remove state clone for slot notifier
* Add mem size approximation for tree hash cache
* Avoid cloning tree hash when getting head
* Avoid cloning tree hash when getting head
* Add working arena-based cached tree hash
* Add another benchmark
* Add pre-allocation for caches
* Make cache nullable
* Fix bugs in cache tree hash
* Add validator tree hash optimization
* Optimize hash_concat
* Make hash32_concat return fixed-len array
* Fix failing API tests
* Add new beacon state cache struct
* Add validator-specific cache
* Separate list and values arenas
* Add parallel validator registry hashing
* Remove MultiTreeHashCache
* Remove cached tree hash macro
* Fix failing tree hash test
* Address Michael's comments
* Add CachedTreeHash impl for ef tests
* Fix messy merge conflict
* Rename cache struct, add comments
* Rename cache struct, add comments
* Remove unnecessary mutability
* Wrap iter in result
* Tidy cached tree hash
* Address Michael comments
* Address more comments
* Use ring::Context
* Start adding interop genesis state to lcli
* Use more efficient method to generate genesis state
* Remove duplicate int_to_bytes32
* Add lcli command to change state genesis time
* Add option to allow VC to start with unsynced BN
* Set VC to do parallel key loading
* Don't default to dummy eth1 backend
* Add endpoint to dump operation pool
* Add metrics for op pool
* Remove state clone for slot notifier
* Add mem size approximation for tree hash cache
* Avoid cloning tree hash when getting head
* Fix failing API tests
* Address Michael's comments
* Add HashMap::from_par_iter
* Implement basic tree hash caching
* Use spaces to indent top-level Cargo.toml
* Optimize BLS tree hash by hashing bytes directly
* Implement tree hash caching for validator registry
* Persist BeaconState tree hash cache to disk
* Address Paul's review comments
* Prototype for far_right push
* Add push method and tests
* Modify beacon_chain_builder for interop to use push instead of create
* Add Push method to MerkleTree
* Cargo fmt
* Remove redundant tests
* Fix typo
* Rename push to push_leaf
* Fix clippy warnings
* Add DepthTooSmall enum variant
* Avoid cloning in MerkleTree::push_leaf
* Add quickcheck test for push_leaf
* Cargo fmt updated
* Return err instead of using unwrap()
* Use enumerate instead of hard indexing
* Use if let and return string on error
* Fix typo in deposit_leave
* Fix cargo fmt
* Prototype for far_right push
* Add push method and tests
* Modify beacon_chain_builder for interop to use push instead of create
* Add Push method to MerkleTree
* Cargo fmt
* Remove redundant tests
* Fix typo
* Rename push to push_leaf
* Fix clippy warnings
* Add DepthTooSmall enum variant
* Avoid cloning in MerkleTree::push_leaf
* Add quickcheck test for push_leaf
* Cargo fmt updated
* Return err instead of using unwrap()
* Use enumerate instead of hard indexing
* Use if let and return string on error
* Fix typo in deposit_leave
* Change into_iter to iter
* Fix clippy 'easy' warnings
* Clippy eth2/utils
* Add struct NetworkInfo
* Clippy for types, utils, and beacon_node/store/src/iters.rs
* Cargo fmt
* Change foo to my_foo
* Remove complex signature
* suppress clippy warning for unit_value in benches
* Use enumerate instead of iterating over range
* Allow trivially_copy_pass_by_ref in serde_utils
* Rename `hashing` crate to `eth2_hashing`
* Add license, desc to eth2_hashing Cargo.toml
* Remove merkle root from eth2 hashing
* Remove old benches folder (zombied from old branch)
* Add docs to eth2_hashing
* Prepare tree_hash for publishing on crates.io
* Update deps to use crates.io instead of paths
* Update all crates to pull ssz from crates.io
* Remove cached_tree_hash, add patches to manifest
* Fix compile error in benches
* Remove unused code
* Fix fake_crypto compile error
