Refactor storage hashing away from opaque types (#903)

* Refactor storage of various modules.

* The real list of claims

* Migration away from opaque maps

* Fix

* Fix for task executor API change

polkadot/runtime/test-runtime/src/lib.rs

@@ -133,7 +133,7 @@ impl system::Trait for Runtime {
 	type Version = Version;
 	type ModuleToIndex = ModuleToIndex;
 	type AccountData = balances::AccountData<Balance>;
-	type OnNewAccount = ();
+	type MigrateAccount = (); type OnNewAccount = ();
 	type OnKilledAccount = ();
 }