Fix redirection after sign in
- devise expects a path returned from method after_sign_in_from()
- templates for create action are not needed, even they are the reason
  for rendering empty page with layout only
Add missing hash sign to fix erb comment
Adjust repository to new package kit api
Add missing dependency on yast2-users
Adapt to changed PackageKit api:
- add textual description to packagekit dbus code
- humanize the description in view
Control panel fixes
- if user is root and module Administrator is installed, display it
- otherwise go to Users module
Fix check of installed module
Use only values related to packages information
Show Updates correctly:
- fix assigning package info under packagekit 0.8
- fix rendering
Fix for PackageKit method UpdatePackages:
- it accepts two params, the first is integer (2 for only_trusted)
  the other one is array of package ids
Fix redirect loop if status not available; redirect to root_path
Exception instance does not have description method
PolicyKit rules use execute action, not write
Make PackageKit connect to DBus only once
- cache the interfaces once connected for further requests
Improve PackageKit checking of version
Do not change translatable strings for maintenance update
Include the fall-through option for helpers
Update *.changes files
Add the reamining .changes files
Merge pull request #93 from vmoravec/new_polkit

Fixes regarding changes in new PolicyKit