update for recent changes in libbitcoin.
add more comments to node_impl
comment out fetch_block_transaction_hashes_by_height for now (removed from blockchain interface).
port obelisk over now.
update libbitcoin-server for recent changes.
add history_db_active_height as an option.
remove redundant Makefiles no longer existing from configure.ac
fix header includes.
add missing header.
update czmq.hpp to czmqpp.hpp to match git repo.
now we stop the blockchain before stopping the threadpools. update node_impl::stop()
updates for stealth_prefix changes.
fix blockchain stealth method
Remove MSVC builds as they are misleading (aren't ready to work).
Merge pull request #6 from evoskuil/version2

Remove MSVC builds as they are misleading (aren't ready to work).