ENH: initial pass at binstar collections
ENH: added keyring config parameter

Set it to plain-text to not encrypt the login token

eg `binstar config --set keyring plain-text`
ENH: added `auth` sub-command

User can now have access to the authentication tokens
ENH: prompts the user to log in if not authenticated
ENH: added -t/--token command line argument to use it you don't want to do a perminant login
FIX: added fixes for new auth
ENH: updated commands and added created with
ENH: added logging
Bumped version
REF: added requirement on python-dateutil
ENH: added puplish mixin
ENH: updated added mixin to class
Merge branch 'feature/authentication' into feature/collections
Merge branch 'feature/publish' into feature/collections
ENH: fixed merge and updated for collections