Responses should not contain transaction count field for block headers

[Danconnolly]

See issue #18

It is not possible to determine the number of transactions in a block using SPV. To determine the number of transactions in a block using the existing P2P protocol, one would have to download the whole block. This would be inconsistent with the principles of SPV.

This field should not have been added to the result set. It will be removed. However, to do so would be a change in the API, so this change will only occur during the release of the next major version. This bug is in itself not enough to trigger the release of a new major version.

This ticket is a backlog item which should be implemented during the next major version update.

[Danconnolly]

Actually, the newish enriched block header message might contain the information. Need to do more research.