Backporting to beta (#3149)

* The front-end for each hard-fork, also EIP-160.

* Address EIP161 a/c

* Include EIP-161b

* EIP-161 part d.

* Fix test build.

* Fix one test, add another.

* Fix use of bloom & renaming.

* Fixed tests

* Initial groundwork for EIP-155

* Fix minor bug.

* Fix all tests finally.

* Rest of EIP-155.

* Add tests for EIP-155 algorithm.

Update transaction tests validation.

* Address grumbles.

* Remove unused code.

* Resolve IPC issues

* Fixed tests

* ipc backports

* Fixing random test failures (#2577)

* Fix SUICIDE gas mechanism and add consensus tests.

* Remove commented code.

* Set Frontier hardfork block number

* Transaction tests,

* Fixed tests

* Removed banning queue

ethcore/src/error.rs

@@ -62,6 +62,8 @@ pub enum TransactionError {
 	},
 	/// Transaction's gas limit (aka gas) is invalid.
 	InvalidGasLimit(OutOfBounds<U256>),
+	/// Invalid network ID given.
+	InvalidNetworkId,
 }
 
 impl fmt::Display for TransactionError {
@@ -80,6 +82,7 @@ impl fmt::Display for TransactionError {
 			GasLimitExceeded { limit, got } =>
 				format!("Gas limit exceeded. Limit={}, Given={}", limit, got),
 			InvalidGasLimit(ref err) => format!("Invalid gas limit. {}", err),
+			InvalidNetworkId => "Transaction of this network ID is not allowed on this chain.".into(),
 		};
 
 		f.write_fmt(format_args!("Transaction error ({})", msg))