New APIs and Better Sessions

• [Feature] Add RPC "Lens" for better client experience #247
• [Feature] Check validators have set keys before changing to new authorities #245
• [Improvement] Improve logic for session changeover to occur only once #248
• [Improvement Remove buggy and_requires validation check. #244
• [Safety] Prevent failures in Notice Dispatch for Checks, Effects, Interactions #240

Gateway, Events and Prices

** Note: hard-fork required **

This patch upgrades the name from compound-chain to gateway. Additionally we:

• Improve Event Ingression
• Create an Oracle Pallet and use Price Inherents
• Improve ECDSA Recovery Speed

Change Authorities [m4]

• Allow Authority Rotation with Proper Session Changeover
• Improve Notice Signatures to:
  • Allow excess signatures in Starport
  • Only accept valid signers on Compound Chain
  • Not emit superfluous "notice already signed" errors
• Fix name and symbol for Cash Token

Lock to Any - Alpha Release [m3]

This patch upgrades the Starports to allow the recipient of a lockTo event to be any address, not just specifically an Ethereum address. This allows us in the near future to transfer assets to a cross-chain account when locking.

Alpha Release [m2]

Milestone 2 improves support for on-chain upgrades and adds some minor test improvements.

Alpha Release [m1]

Genesis deployment for Gateway alpha test-net.