Merge pull request #47 from PalmStoneGames/master

Channeler + test fixes + Poller fix
starting work on auth
zauth can now deny and allow
PLAIN auth working
Merge pull request #50 from taotetek/master

Add basic support for zAuth
starting on zcert
Merge pull request #53 from PalmStoneGames/master

Increase channeler test timeout to 250ms
Merge pull request #52 from taotetek/master

Problem: we don't support zcert
now sending curve messages
Merge pull request #54 from taotetek/master

Problem: CURVE is not implemented yet
changing CurveAllow to Curve
Merge pull request #55 from taotetek/master

Problem: Auth API was inconsistent
Ensure czmq doesn't override Go's own signal handling