* Add Rialto as a target for the Millau node
* Rename Rialto module to Rialto-PoA
This will reduce confusion as the Millau runtime has a
Rialto module as well which refers to the Substrate chain.
* Add Millau as a target for the Rialto node
* Be more explicit about Rialto PoA related code
* Missed some name changes in the Ethereum PoA relay
* Re-export Substrate pallet structs used by node
* Remove `first_scheduled_change` of Millau in Rialto node
* Make Millau's genesis config for Rialto bridge more accurate
* Set initial header for Millau config
* Update initial Millau authorities
Co-authored-by: Svyatoslav Nikolsky <svyatonik@gmail.com>
* RustFmt Millau authorities
Co-authored-by: Svyatoslav Nikolsky <svyatonik@gmail.com>
* Implement public helpers for querying header info
* Update `best_header` when importing headers
* Add BestHeader to GenesisConfig
* Define extra types for Millau primitives
* Start implementing runtime APIs in Millau runtime
* Add helper for getting headers which require a justification
* Add runtime API for getting headers requiring a justification
* Reword `expect()` proof for valid authority sets
* Fix typo
* Clean up Hasher comment
* Add the Call Dispatch Pallet back to the Millau runtime
* Use types from Rialto in bridge pallet config
* Use the Rialto runtime APIS in the Millau runtime
* Include Millau bridge instance in Rialto runtime
* Add missing doc comment
* Use one storage function for setting and clearing `RequiresJustification`
* Remove TODO comments
Hernando Castano