message: Rollback arith_uint256 to uint256 changes for zerocoin tests
diff: #include <fstream>
  #include <curses.h>
  #include <exception>
  -#include "CDataStream.h"
  +#include "streams.h"
  #include "Zerocoin.h"
  using namespace std;
  @@ -205,8 +205,8 @@ ZerocoinTutorial()
  // assume you've formatted this transaction and placed the hash into
  // "transactionHash". We'll also assume "accumulatorHash" contains the
  // hash of the last block whose transactions are in the accumulator.
  - uint256 transactionHash = ArithToUint256(arith_uint256(DUMMY_TRANSACTION_HASH));
  - uint256 accumulatorID = ArithToUint256(arith_uint256(DUMMY_ACCUMULATOR_ID));
  + uint256 transactionHash = DUMMY_TRANSACTION_HASH;
  + uint256 accumulatorID = DUMMY_ACCUMULATOR_ID;
  // Place "transactionHash" and "accumulatorBlockHash" into a new
  // SpendMetaData object.
  