Rename codec -> substrate-codec, executor -> substrate-executor.

substrate/wasm-runtime/polkadot/src/lib.rs

@@ -27,7 +27,7 @@ extern crate rustc_hex;
 #[macro_use]
 extern crate log;
 
-extern crate polkadot_codec as codec;
+extern crate substrate_codec as codec;
 extern crate polkadot_primitives as primitives;
 
 #[cfg(test)]

substrate/wasm-runtime/polkadot/src/runtime/parachains.rs

@@ -16,6 +16,7 @@
 
 //! Main parachains logic. For now this is just the determination of which validators do what.
 
+use runtime_std::prelude::*;
 use runtime_std::mem;
 use codec::{Slicable, Joiner};
 use support::{Hashable, with_env, storage};