RPC & Client (#21)

* Initial version of http server.

* Refactor the structure.

* add unassigned ports info.

* Rename servers to match conventions.

* Add client crate and some proper RPC implementations.

* Style & docs.

substrate/rpc/src/lib.rs

@@ -0,0 +1,41 @@
+// Copyright 2017 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot 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.
+
+// Polkadot 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 Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Polkadot RPC interfaces.
+
+#![warn(missing_docs)]
+
+extern crate jsonrpc_core as rpc;
+extern crate polkadot_client as client;
+extern crate polkadot_primitives as primitives;
+extern crate polkadot_state_machine as state_machine;
+
+#[macro_use]
+extern crate error_chain;
+#[macro_use]
+extern crate jsonrpc_macros;
+
+#[cfg(test)]
+extern crate polkadot_contracts;
+#[cfg(test)]
+#[macro_use]
+extern crate assert_matches;
+
+pub mod chain;
+pub mod state;
+
+#[cfg(test)]
+mod test_helpers;