[lipstick] Properly filter out multitouch events
Merge pull request #208 from giucam/multitouch

[lipstick] Properly filter out multitouch events
Merge pull request #207 from giucam/master

[liptick] Fix the tests again
[lipstick] Don't raise or lower unmapped windows

The category or other propertiy of the window may not be set yet,
producing unwanted behavior.