Logs are now recorded per transactions instead of tossing them out after
each transaction. This should also fix an issue with
`eth_getFilterLogs` (#629) Also now implemented are the `transactionHash,
blockHash, transactionIndex, logIndex` on logs. Closes #654.

* Block(s)
* Transaction(s)

* Don't expand mem on empty value
* Removed all coinbase logs for PV42
* Removed C++ bug stuff for LOG*

* Reverted back to process blocks in batches method
* Bloom generation and lookup fix
* Minor UI changed (mainly debug)

* Moved logs to state so it's subject to snapshotting
* Split up block header
* Removed logs from transactions and made them receipts only

* Bloom
* Block restructure
* Receipts