Pass version message to sync when starting sync session

Temporary switched to github version of tokio-core

Get rid of separate cpu pool in sync

Fix build

Updated dependencies

Implemented blocknotify option

Remove debug print from sync

Fixed clippy warnings in sync

Mempool double send is now checked during reorganizations

Remove outdated todos in db

p2p statistics extended

Update rocksdb dependency

Sync refactoring

Bloom for transaction meta

Use shared crate for big integers