Rewards and slashing, early-exit of bad sessions (#234)

* Recompile runtime.

* Introduce and enforce block time

* Introduce early session ending.

* Report most of staking module

* rewards, proper early exit and slashing

* Fix build & session logic, introduce tests

* Fixed staking tests.

* Initial test for reward

* Fix test

* Tests for slashing

* Update/fix preset configs

* Fix some tests.

* Fix some staking tests

* Minor fix

* minor cleanups

* Fix build

* Rename timestamp::Value -> Moment

* Require final block of session to be timely

substrate/demo/runtime/src/lib.rs

@@ -85,9 +85,9 @@ impl consensus::Trait for Concrete {
 pub type Consensus = consensus::Module<Concrete>;
 
 impl timestamp::Trait for Concrete {
-	const SET_POSITION: u32 = 0;
+	const TIMESTAMP_SET_POSITION: u32 = 0;
 
-	type Value = u64;
+	type Moment = u64;
 }
 
 /// Timestamp module for this concrete runtime.
@@ -103,6 +103,7 @@ impl Convert<AccountId, SessionKey> for SessionKeyConversion {
 
 impl session::Trait for Concrete {
 	type ConvertAccountIdToSessionKey = SessionKeyConversion;
+	type OnSessionChange = Staking;
 }
 
 /// Session module for this concrete runtime.
@@ -182,6 +183,7 @@ impl_outer_config! {
 		StakingConfig => staking,
 		DemocracyConfig => democracy,
 		CouncilConfig => council,
+		TimestampConfig => timestamp,
 	}
 }