Compact format for block number, nonce, balance (#910)

* Try to make everything compact

* Make `Clone` work

* Fix

* Move contracts and balances over to compact encoding

* Session and timestamp are compact

* Sataking uses compact numbers

* Treasury now compact

* Compact Democracy

* Council is compact

* Fix

substrate/core/network/src/on_demand.rs

@@ -820,7 +820,7 @@ pub mod tests {
 		});
 		let thread = ::std::thread::spawn(move || {
 			let result = response.wait().unwrap();
-			assert_eq!(result.hash(), "0x950856031909d22d42b7e11a837051fbde05beaa3ffb793d6e8e373c646459b1".into());
+			assert_eq!(result.hash(), "0x6443a0b46e0412e626363028115a9f2cf963eeed526b8b33e5316f08b50d0dc3".into());
 		});
 
 		on_demand.on_remote_header_response(&mut network, 0, message::RemoteHeaderResponse {

substrate/core/network/src/protocol.rs

@@ -416,6 +416,7 @@ impl<B: BlockT, S: Specialization<B>, H: ExHashT> Protocol<B, S, H> {
 		}
 	}
 
+	#[allow(dead_code)]
 	pub fn peer_info(&self, peer: NodeIndex) -> Option<PeerInfo<B>> {
 		self.context_data.peers.read().get(&peer).map(|p| {
 			PeerInfo {