IPC (feature-gated) (#1654)

* moving ipc deriving to trait

* refactoring of the client

* all compiled

* proved all working

* warnings purged

* allow hypervisor to specify initialization payload in two ways

* using binary initialisation payload for sync

* some docs

* logger to separate crate

* log settings for sync bin

* forwarding logging arguments to the sync

ethcore/src/client/mod.rs

@@ -30,7 +30,7 @@ pub use self::test_client::{TestBlockChainClient, EachBlockWith};
 pub use types::trace_filter::Filter as TraceFilter;
 pub use executive::{Executed, Executive, TransactOptions};
 pub use env_info::{LastHashes, EnvInfo};
-pub use self::chain_notify::ChainNotify;
+pub use self::chain_notify::{ChainNotify, ChainNotifyClient};
 
 pub use types::call_analytics::CallAnalytics;
 pub use block_import_error::BlockImportError;