client for obelisk.
resend request if expired.
actually resend expired reqs.
refactored zmsg2 to zmq_message
obworker
added queue. needs cleanup at some point but works for now.
basic framework for worker mapped out.
pass the history back and deserialize it.
use proper logging facilities for worker.
added missing files for worker.
generate libobelisk_client.a in Makefile.
refactor core as a header and src. client is a library.
obelisk/client/interface.hpp
pass connection argument to fullnode_interface constructor.
added build script.
tidy up project build system.
also build shared files too.
libconfig++-dev dependency in README.
client install in makefile.
system wide cfg file for obworker in /etc and install download-blockchain tool.