* seal: Copy over a legacy version of pallet_contracts from substrate
* seal: Fix substrate dependency pathes and add as dependency to runtime
* seal: Adapt pallet to current substrate version
* seal: Add contracts pallet to runtime
* seal: Implement rpc runtime api
* seal: Update to latest rpc output format
* seal: Replace child trie by prefix trie
* seal: Add contracts endpoint to the client
* seal: fixup rpc test
* Fix whitespace issue
Co-authored-by: Sergei Shulepov <sergei@parity.io>
* seal: Move pallet out of the runtime directory
* seal: Create a seperate runtime for contracts
* Move parachains to top level directory
* seal: Disable rent for easier testing
Co-authored-by: Sergei Shulepov <sergei@parity.io>