Exposing RPC over Signer WebSockets

implement missing rpc methods and tests

json ipc server version bump

Updated dependencies for windows build

Framework for improved RPC unit tests

* use #[repr(C)] for all hash types

* use a zeroed buffer in crypto::ec::sign

* eliminate most usages of unsafe in crypto::ecdh::agree

* eliminate all possible unsafety in crypto module

Conflicts:
	dapps/src/lib.rs
	parity/main.rs
	parity/signer.rs
	signer/Cargo.toml
	signer/src/lib.rs

* Basic signing queue

* Adding docs

* WebSockets server for signer

* Removing TODO

* Shortening the syntax

* Exposing types from RPC

* Fixing indentation

* Update main.rs

Fixing few clippy warnings

Conflicts:
	parity/signer.rs
	signer/Cargo.toml
	signer/src/lib.rs
	signer/src/ws_server/mod.rs

Conflicts:
	rpc/src/v1/types/bytes.rs

Change eth_signAndSendTransaction to personal_SignAndSendTransaction

also adds an EthTester struct for more test flexibility.