pwnlib.util.proc.pidof() now handles pwnlib.tubes.sock.sock objects rather than just pwnlib.tubes.remote.remote
removed warning that only IPv4 is supported from docstring in pwnlib.util.proc.pidof
added documentation and some slight improvements to pwnlib.gdb.attach()
docstring fix in pwnlib.gdb.attach(): added return value
added pwnlib.gdb to the docs