Support utils for the bloom filter

[ruXlab]

Feature description_

Ethereum has very powerful tool - bloom filter, with it many potentially unnecessary operations can be avoided. For instance, when checking for specific logs in the block no need to pull all transactions of it. Instead the bloom filter match can be checked first on the client side and then if there is a match the complete block information can be retrieved.

It's just one of the use cases

web3js has these utility functions