added sender and responder info to header
_header can now be used for anything specifically socket related
Fixed bug where socket must create a copy of processed packet to avoid issue when coder returns the original packet just altered from the packet processor
refactor passed int opts (path no longer passed separately)
removed .packet property moving process to root property
and thus _packetProcess is private method for packet processing
re-export in index both Socket and Consumer as named and as props of default
refactor test and examples accordingly
David Kebler