Pending

BREAKING CHANGES:

[types] Header ...
[state] Add NextValidatorSet, changes on-disk representation of state
[state] Validator set changes are delayed by one block (!)
[lite] Complete refactor of the package
[rpc] /commit returns a signed_header field instead of everything being top-level
[abci] Added address of the original proposer of the block to Header.
[abci] Change ABCI Header to match Tendermint exactly

FEATURES:

IMPROVEMENTS:

BUG FIXES: