DO NOT MERGE: Proposal for multiple read addresses

[EasterTheBunny]

ContractReader needs the ability to read events and methods from the same contract configuration at multiple addresses.

Restrictions

• Bind is required due to needing a contract address for event processing before GetLatestValue or QueryKey is called

Other Considerations

• A request has been made to simplify contract and method into a single identifier
• Supplying an address for a binding makes it unique and not able to be 'overridden'. Unbind is necessary to remove a binding.
• Concatenating multiple values into a single 'key' might convolute the key. This might not be the optimal solution, favoring a UUID or other key generation method instead.