Transaction eras (#758)

* Initial groundwork

* A mess.

* Integrate

* Fix tests

* Unit tests

* Tests for unchecked_extrisnic

* fix tab

* Improve binary format.

* fix tests

* Rename extrinsic-pool -> transaction-pool

Closes #770

* Implement unimplemented.

* typo

substrate/core/transaction-pool/src/lib.rs

@@ -0,0 +1,49 @@
+// Copyright 2018 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+// tag::description[]
+//! Generic extrinsic pool.
+// end::description[]
+
+#![warn(missing_docs)]
+#![warn(unused_extern_crates)]
+
+extern crate futures;
+extern crate parking_lot;
+extern crate sr_primitives as runtime_primitives;
+
+#[macro_use]
+extern crate log;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+extern crate transaction_pool as txpool;
+#[cfg(test)] extern crate substrate_test_client as test_client;
+#[cfg(test)] extern crate substrate_keyring as keyring;
+#[cfg(test)] extern crate parity_codec as codec;
+
+pub mod watcher;
+mod error;
+mod listener;
+mod pool;
+mod rotator;
+
+pub use listener::Listener;
+pub use pool::{Pool, ChainApi, EventStream, Verified, VerifiedFor, ExtrinsicFor, ExHash, AllExtrinsics};
+pub use txpool::scoring;
+pub use txpool::{Error, ErrorKind};
+pub use error::IntoPoolError;
+pub use txpool::{Options, Status, LightStatus, VerifiedTransaction, Readiness, Transaction};