Fix and cleanups (#314)

* Cleanups (remove genesis.wasm & nicer errors)

- Pretty errors for version mismatch
- Remove the need for genesis wasm

* Remove unneeded wasm files

* Improve code of conduct

* Leaner code

* Test fixes

* fix tests

* Fix consensus checking

substrate/polkadot/api/src/full.rs

@@ -200,7 +200,7 @@ mod tests {
 			timestamp: Some(Default::default()),
 		};
 
-		::client::new_in_mem(LocalDispatch::new(), genesis_config).unwrap()
+		::client::new_in_mem(LocalDispatch::with_heap_pages(8), genesis_config).unwrap()
 	}
 
 	#[test]