- Optional limit for the amount of gas transactions may have;
- option to restruct transactions returned/queried to only those
which have been executed.

* replace deprecated hashdb method names

* spaces -> tabs

Rather than just the canon chain.

Rather than just the canon chain.

* Introduce whitelist for softfork

* Use extradata for fork id.

* Fix condition.

* Removing old transactions

* Explanation comment [ci skip]

* bump rust-crypto

* initial version of account provider utilizing secret store

* update lazy_static to latest version

* AccountProvider accounts method

* new AccountProvider tests in progress

* basic tests for new AccountProvider

* ethcore compiles with new account provider and secret store

* ethcore-rpc build now compiling with new AccountProvider

* most rpc tests passing with new accounts_provider

* fixed basic_authority tests

* fixed eth_transaction_count rpc test

* fixed mocked/eth.rs tests

* fixed personal tests

* fixed personal signer rpc tests

* removed warnings

* parity compiling fine with new sstore

* fixed import direction

* do not unlock temporarily when we have the password

* removed TODO in account import

* display warning on auto account import failure

* fixed compiling of ethstore on windows

* ethstore as a part of parity repo

* added ethkey

This mimics the fucntionality of Geth and the current unratified
JSONRPC spec (but not the functionality of eth and the ratified
spec).