Transaction queue integration + submission RPC (#99)

* Implement transaction queue RPC.

* whitespace

* Support without_std env in environmental!  (#110)

* Make environmental crate support without_std env.

* Small doc fixes.

* Remove dead code.

substrate/substrate/rpc/src/author/mod.rs

@@ -0,0 +1,49 @@
+// 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/>.
+
+//! Substrate block-author/full-node API.
+
+use std::sync::Arc;
+use parking_lot::Mutex;
+use primitives::block::Extrinsic;
+
+pub mod error;
+
+#[cfg(test)]
+mod tests;
+
+use self::error::Result;
+
+build_rpc_trait! {
+	/// Substrate authoring RPC API
+	pub trait AuthorApi {
+		/// Submit extrinsic for inclusion in block.
+		#[rpc(name = "author_submitExtrinsic")]
+		fn submit_extrinsic(&self, Extrinsic) -> Result<()>;
+	}
+}
+
+/// Variant of the AuthorApi that doesn't need to be Sync + Send + 'static.
+pub trait AsyncAuthorApi: Send + 'static {
+	/// Submit extrinsic for inclusion in block.
+	fn submit_extrinsic(&mut self, Extrinsic) -> Result<()>;
+}
+
+impl<T: AsyncAuthorApi> AuthorApi for Arc<Mutex<T>> {
+	fn submit_extrinsic(&self, xt: Extrinsic) -> Result<()> {
+		self.as_ref().lock().submit_extrinsic(xt)
+	}
+}