~jconti/ubuntu/precise/screen-resolution-extra/fix_empty_package

* policy-dontzap.py, policyui.py: Add missing hashbang lines (files are
  executable).
* debian/control: Update Vcs-Bzr: to ubuntu-desktop branch.
* Port to polkit-1: (LP: #435709):
  - screenresolution-mechanism.policy.in: auth_self_keep_always →
    auth_admin_keep.
  - setup.{py,cfg}: Install policy file into share/polkit-1/actions.
  - Drop ScreenResolution/policykit.py, and its usage in policyui.py and
    policy-dontzap.py; client-side handling of PK is not necessary any more.
  - screenresolution-mechanism.py: Drop PolicyKitAuthentication class, it's
    way too complicated.
  - screenresolution-mechanism.py, _check_permission(): Call polkit-1
    instead of old PolicyKit.
* screenresolution-mechanism.py: Actually enforce privilege check by calling
  _check_permission() in the service methods.
* debian/control: Add policykit-1 dependency.
* debian/control: Bump Standards-Version to 3.8.3 (no changes necessary).