Make transactions receipts part of transaction inclusion proof (#236)

* make receipts part of tx proof

* is_successful_raw_receipt_with_empty_data

* cargo fmt --all

* clippy

* fix everything

bridges/bin/node/runtime/src/kovan.rs

@@ -149,7 +149,7 @@ impl PeerBlockchain for KovanBlockchain {
 			return None;
 		}
 
-		proof.proof.get(proof.index as usize).cloned()
+		proof.proof.get(proof.index as usize).map(|(tx, _)| tx.clone())
 	}
 }