Use explicit global namespaces in codegen (#1928)

* ipc as a deault feature

* first part of purge

* second part of ns purge

ethcore/src/client/chain_notify.rs

@@ -14,9 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use std::collections::VecDeque;
-use std::mem;
-use ipc::{IpcConfig, BinaryConvertError};
+use ipc::IpcConfig;
 use util::H256;
 
 /// Represents what has to be handled by actor listening to chain events

ethcore/src/client/traits.rs

@@ -33,9 +33,7 @@ use executive::Executed;
 use env_info::LastHashes;
 use types::call_analytics::CallAnalytics;
 use block_import_error::BlockImportError;
-use std::mem;
-use std::collections::VecDeque;
-use ipc::{IpcConfig, BinaryConvertError};
+use ipc::IpcConfig;
 use types::blockchain_info::BlockChainInfo;
 use types::block_status::BlockStatus;