HadoopCryptoLedger V1.2.0

Added support for large numbers (e.g. value of transactions). Note: This changes some fields from long to BigInteger (or to HiveDecimal(38,0) or Spark Decimal(38,0), depending on the platform). Related to issue #51. You may need to review your application to fit to the new datatypes. Change applied to Bitcoin and Ethereum on all supported Big Data platforms.
Some small fixes to the HiveUDFs (e.g. Ethereum calculate sendAddress, chainid was not read correctly from parameters)