= Add eth_node_fingerprint to block that can be imitated by both hot and cold imports
- Only sync missing blocks (blocks that are missing or don't share a fingerprint) on cold import
- Set block is_final status after import
* Rename geth package structs to not be prefaced with package name
* No longer need to dump schema since Travis uses migrate
* Rearrange history package
* Removed double request for receipt from block rewards
* Remove Listener + Observers and Replace w/ Polling Head
* Potential Short term Issue w/ Infura (ignore these tests for now)
* Update Block w/ newest Block
* Add cascading delete to blocks and transactions tables
* Add handling for new conflicting blocks
* Command line version of sliding window n behind HEAD
* The command populates up to the highest known block number
* The anticipated use case is that the listener will be running
in parallel to the populateBlocks command
* This will mean that the listener is responsible for picking up
new blocks, and the populateBlocks command is reposible for
historical blocks
* Reformat SQL statements
