* signed_root -> signing_root
* implement new process_deposit; update timing parameters to 0.6.1; update Deposit to 0.6.1 and remove DepositInput
* update get_active_validator_indices and get_epoch_committee_count to 0.6.1; rm get_current_epoch_committee_count, get_previous_epoch_committee_count, and get_next_epoch_committee_count; bump state_sim default validator count a bit more
* re-introduce 0.5.1-ish get_active_validator_indices, get_epoch_committee_count as scaffolding for still-0.5.1ish shuffling
* Load full state test + Add json-serialization for Bitfield
* Implement empty_block_transition test (but test is missing the end state)
* Use the provided empty block instead of mocking one
* Add failing block signing test
* Tests that can't be passed now are now "for information" + indent the "information"/hash given
* initial commit of official state tests
* sanity check fixture
* Parsing official state test is mostly working
(Except BLS signature)
* Successfully load state test
* Use json-serialization instead of json and display deserialized and from scratch beacon state hashes
* Add official state test as a smoke parsing test