ABI parsing, cacheing and usage is very ppor

[tjayrush]

In the getBlock function, I will re-write the data even if the file already exists. We should make the data 'gold' (by checking it against the raw results from parity or geth) and then never write it again. To recast the data (i.e. changes its contents or format), one would have to delete the file explicitly

In a recent case, I had programmed getBlock incorrectly and was writing partial data to the file, thereby corrupting immutable data.

From In a recent case, I had programmed getBlock incorrectly and was writing partial data to the file, thereby corrupting immutable data.

From https://github.com/Great-Hill-Corporation/ethslurp/issues/107

[tjayrush]

I should remove most of the code in transactions.cpp related to parsing the chain for [{FUNCTION}]

[tjayrush]

Closing in lieu of #42