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).