- Delete header on conflict to prompt data refresh (cascade deletes all
data associated with that block)
- Derive header hash from rpc payload rather than computing it from data
(prevents hash mismatch between blockchain and cache)
* Add getSignatures command for list of signatures in constants
* Update VatTune converter's formatting of addresses
and added an integration test
* Move VatTune and PriceFeeds integration tests to a common suite
* Update VatGrab converter for address format
* Update frob converter to fix urn and ilk formatting/decoding
* Update formatting
* Update make test command and add integrationtest command
* Add integration test to travis build
* Update creating headers in integration tests to include Raw and Timestamp fields
