Tagged transaction queue integration (#893)

* Make the graph generic.

* Adapting pool API for the graph.

* Merge pool & graph.

* Restructure.

* Fix test of transaction pool.

* Get rid of node/transaction-pool.

* Compilation fixes.

* Test7

* Fix compilation of tests.

* Revert runtime changes.

* Add validate_transaction to test-runtime.

* Fix RPC tests.

* Add clearing of the old transactions.

* Trigger pool events.

* Use new queue API.

* Fix wasm build, re-export Hasher.

* No warning if validate transaction fails.

* Get rid of Into<u64> and use As

substrate/core/sr-primitives/src/generic/header.rs

@@ -81,7 +81,6 @@ impl<'a, Number: 'a, Hash: 'a + HashT, DigestItem: 'a> Deserialize<'a> for Heade
 	}
 }
 
-// TODO [ToDr] Issue with bounds
 impl<Number, Hash, DigestItem> Decode for Header<Number, Hash, DigestItem> where
 	Number: Decode,
 	Hash: HashT,

substrate/core/sr-primitives/src/generic/unchecked_mortal_extrinsic.rs

@@ -200,7 +200,7 @@ mod tests {
 
 	const DUMMY_FUNCTION: u64 = 0;
 	const DUMMY_ACCOUNTID: u64 = 0;
-	
+
 	type Ex = UncheckedMortalExtrinsic<u64, u64, u64, TestSig>;
 	type CEx = CheckedExtrinsic<u64, u64, u64>;