salt.modules.at: moar cleanups
salt.modules.at: moar cleanups

    - Overriding builtin functions (bin()) with variables is a
      bad idea that will just eventually bite you. s/bin/&ary/g
    - Change *opts --> *args and *pargs --> *args like the rest
      of the python world. Consistency is a beautiful thing folks
    - None is a singleton, so pep8 says to use the is operator
    - Make __virtual__() return False if at isn't found in $PATH
    - Switch from __salt__['cmd.which'] to just importing and
      using the function directly. Slightly less overhead
    - Change two if statements to if/elsif

This module still needs a bit more love.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt