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/substrate/runtime/version/src/lib.rs

@@ -39,6 +39,9 @@ use codec::Slicable;
 #[cfg(feature = "std")]
 use std::borrow::Cow;
 
+#[cfg(feature = "std")]
+use std::fmt;
+
 #[cfg(feature = "std")]
 pub type VersionString = ::std::borrow::Cow<'static, str>;
 #[cfg(not(feature = "std"))]
@@ -108,6 +111,13 @@ impl Default for RuntimeVersion {
 	}
 }
 
+#[cfg(feature = "std")]
+impl fmt::Display for RuntimeVersion {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "{}-{}:{}({}-{})", self.spec_name, self.spec_version, self.authoring_version, self.impl_name, self.impl_version)
+	}
+}
+
 #[cfg(feature = "std")]
 impl RuntimeVersion {
 	/// Check if this version matches other version for calling into runtime.