* Open a trie from the in-memory database
* Use a node's LeafKey as an identifier instead of the address
It was proving difficult to find look the address up from a given path
with a full node (sometimes the value wouldn't exist in the disk db).
So, instead, for now we are using the node's LeafKey with is a Keccak256
hash of the address, so if we know the address we can figure out which
LeafKey it matches up to.
* Make sure that statediff has been processed before pruning
* Use blockchain stateCache.OpenTrie for storage diffs
* Clean up log lines and remove unnecessary fields from builder
* Apply go fmt changes
* Add a sleep to the blockchain test
* Address PR comments
* Address PR comments
