Update to latest Substrate (#340)

* Update Substrate

* Update Substrate again

* Integrate weight/fee stuff.

* Add new files.

polkadot/runtime/src/constants.rs

@@ -0,0 +1,41 @@
+// Copyright 2019 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/>.
+
+/// Money matters.
+pub mod currency {
+	use primitives::Balance;
+
+	pub const DOTS: Balance = 1_000_000_000_000;
+	pub const BUCKS: Balance = DOTS / 100;
+	pub const CENTS: Balance = BUCKS / 100;
+	pub const MILLICENTS: Balance = CENTS / 1_000;
+}
+
+/// Time.
+pub mod time {
+	pub const SECS_PER_BLOCK: u64 = 6;
+	pub const MINUTES: u64 = 60 / SECS_PER_BLOCK;
+	pub const HOURS: u64 = MINUTES * 60;
+	pub const DAYS: u64 = HOURS * 24;
+}
+
+/// Fee-related.
+pub mod fee {
+	pub use sr_primitives::Perbill;
+
+	/// The block saturation level. Fees will be updates based on this value.
+	pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
+}