* Create new column family for local node info
* remove DBTransaction::new reliance on DB
* KeyValueDB trait
* InMemory KeyValueDB implementation
* journaldb generic over KVDB
* make most of `ethcore` generic over KVDB
* fix json tests compilation
* get all tests compiling
* implement local store (just for transactions)
* finish local store API, test
* put everything into place
* better test for skipping bad transactions
* fix warning
* update local store every 15 minutes
* remove superfluous `{}`s
* CHT builder and prover
* use CHT abstraction in provider
* hide CHT internals from header chain
* fix itertools conflict by updating all to 0.5
* cht proof checker, use it in on_demand
* remove register_account_provider
* build rpc module
* new dummy client
* common EngineSigner struct
* from -> into
* initial report via call
* separate safe from regular contract
* transact_contract
* fix build
* return Signature, docs
* add sign method to some engines
* add safeContract spec
* update specs to new contracts
* use AuthorityRound for contract spec
* add more reporting
* add reporting test
* use gas floor
* shorter
* prune states based on memory param
* pruning memory CLI and usage in sync
* return purged value from memorydb
* calculate memory used incrementally in overlayrecentdb
* refactor shared history pruning code in client
* Fixed usage alignment
* journal_size function for fast memory calculation
* remove old lint silencer
* dispatch requests only to peers with higher TD
* dynamic target for sync rounds
* use round pivots instead of frames, fix test
* fix total difficulty calculation for test client
* fix broken reorg algorithm
* fork test, fix ancestor search
* Return 0 instead of error with out of gas on estimate_gas
* Fix stuff up.
* Another estimate gas fix.
* Alter balance to maximum possible rather than GP=0.
* Only increase to amount strictly necessary.
* Improvements and optimisations to estimate_gas.
- Introduce proper error type
- Avoid building costly traces
* Fix tests.
* Actually fix testsActually fix tests
* Return 0 instead of error with out of gas on estimate_gas
* Fix stuff up.
* Another estimate gas fix.
* Alter balance to maximum possible rather than GP=0.
* Only increase to amount strictly necessary.
* make on_connect/disconnect public
* free flow params constructor
* Shared ownership of LES handlers
* light provider impl for test client
* skeleton for testing light sync
* have test_client use actual genesis
* fix underflow in provider
* test harnesses for lightsync
* fix tests
* fix test failure caused by test_client changes
* Moving logs to separate, testable function
* Adding test
* Fixing log index
* Adding transaction log index
* Fixing rpc tests
* Making interface of a bit cleaner.
* owning views of blockchain data
* port blockchain and client traits to owning views
* fix ethcore tests
* use strong headers and bodies in ethcore_light
* port ethsync to use owning views
* port rpc to owning views
* port parity informant and blockchain export
* Allow sync reorg up to pruning history size
* Peer difficulty tracking
* Abort downloading block if received with NewBlock
* Set pruning history to 1200
* Renamed history size field
