xrep/xreq don't belong in constant_names
Add TOS packet priority socket option
add 4.1.0 socket section

ROUTER_HANDOVER, TOS to start
setup constants with ROUTER_HANDOVER
Add Authentication
review comment updates
Fix string format to work with Python 2.6 too
Convert to top level function
Merge pull request #447 from claws/add_tos

closes #447
Install libsodium to run tests with curve feature
Rework design to separate authentication logic
Rework design to separate authentication logic
Cleanup
switch to ppa
Cleanup
Merge pull request #452 from ticosax/run-curve-tests

Install libsodium to run tests with curve feature
Merge branch 'master' of https://github.com/zeromq/pyzmq into add_auth
Cleanups
Add security examples
Add IOLoop auth tests and cleanup