Phase 1 of repo reorg (#719)

* Remove unneeded script

* Rename Substrate Demo -> Substrate

* Rename demo -> node

* Build wasm from last rename.

* Merge ed25519 into substrate-primitives

* Minor tweak

* Rename substrate -> core

* Move substrate-runtime-support to core/runtime/support

* Rename/move substrate-runtime-version

* Move codec up a level

* Rename substrate-codec -> parity-codec

* Move environmental up a level

* Move pwasm-* up to top, ready for removal

* Remove requirement of s-r-support from s-r-primitives

* Move core/runtime/primitives into core/runtime-primitives

* Remove s-r-support dep from s-r-version

* Remove dep of s-r-support from bft

* Remove dep of s-r-support from node/consensus

* Sever all other core deps from s-r-support

* Forgot the no_std directive

* Rename non-SRML modules to sr-* to avoid match clashes

* Move runtime/* to srml/*

* Rename substrate-runtime-* -> srml-*

* Move srml to top-level

substrate/core/network/src/specialization.rs

@@ -0,0 +1,48 @@
+// Copyright 2017 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/>.
+
+//! Specializations of the substrate network protocol to allow more complex forms of communication.
+
+use ::NodeIndex;
+use runtime_primitives::traits::Block as BlockT;
+use protocol::Context;
+
+/// A specialization of the substrate network protocol. Handles events and sends messages.
+pub trait Specialization<B: BlockT>: Send + Sync + 'static {
+	/// Get the current specialization-status.
+	fn status(&self) -> Vec<u8>;
+
+	/// Called on start-up.
+	fn on_start(&mut self) { }
+
+	/// Called when a peer successfully handshakes.
+	fn on_connect(&mut self, ctx: &mut Context<B>, who: NodeIndex, status: ::message::Status<B>);
+
+	/// Called when a peer is disconnected. If the peer ID is unknown, it should be ignored.
+	fn on_disconnect(&mut self, ctx: &mut Context<B>, who: NodeIndex);
+
+	/// Called when a network-specific message arrives.
+	fn on_message(&mut self, ctx: &mut Context<B>, who: NodeIndex, message: ::message::Message<B>);
+
+	/// Called on abort.
+	fn on_abort(&mut self) { }
+
+	/// Called periodically to maintain peers and handle timeouts.
+	fn maintain_peers(&mut self, _ctx: &mut Context<B>) { }
+
+	/// Called when a block is _imported_ at the head of the chain (not during major sync).
+	fn on_block_imported(&mut self, _ctx: &mut Context<B>, _hash: B::Hash, _header: &B::Header) { }
+}