message: Changed data field to bytes in eth/getOperation for contract calling
  Summary:
  Reviewers: bigly, tyler, barath
  Subscribers: tyler
diff: @@ -138,12 +138,12 @@ class Eth extends BaseCoin {
  */
  getOperation(recipient, expireTime, contractSequenceId) {
  return [
  - ['string', 'address', 'uint', 'string', 'uint', 'uint'],
  + ['string', 'address', 'uint', 'bytes', 'uint', 'uint'],
  [
  'ETHER',
  new ethUtil.BN(ethUtil.stripHexPrefix(recipient.address), 16),
  recipient.amount,
  - ethUtil.stripHexPrefix(recipient.data) || '',
  + new Buffer(ethUtil.stripHexPrefix(recipient.data) || '', 'hex'),
  expireTime,
  contractSequenceId
  ]
  