Various Fixes & Features

[keefertaylor]

Including, but not limited to:

• Add testing to sanity check batching correctness
• Implement asset list querying from cosmos chain registry
• Remove poorly conceived OneFeeToken function
• Add logging for rpc / registry clients
• Fix bug with unwrapping context errors in rpc / registry clients
• Fix bug where non included txs would be retried in checkIncluded in grpc rpc client
• Fix various chain name / chain id mismatches in cosmos gas code (TODO: make a more generalized API)
• Fix bug where chainRegistryClient was not initialized in defaultGasManager's constructor
• Explicitly pass gasWanted to GasManager. It is not populated correctly in the tx broadcast result
• Support Agoric's cointype
• Fix bug where chainID wasn't populated in signer metadata
• Revise GasManager to track codespace as well