turn on compiler warnings
use the new sd0x q to cleanly close sockets
zmq 3.x compatible error checking
resolve compiler warnings and some minor cleanup
safely convert k strings to null terminated strings before passing to zmq
make the api more q 3.0 friendly by using longs instead of ints for params
initial 3x implementation
add README
cleanup some c cruft
add tests
support for receiving multi-part messages
add support for sending multipart messages
docs