Build Lipstick documentation with Doxygen
Bump version
Documentation installation fix
replace std::find_if with slightly more normal looping

this is (imnsho and all those things) a bit more readable, and fixes a
bad bug where the whole model was essentially resetting itself each time
anything in the desktop dir changed, leading to newly added files having
random positions instead of being appended at the end.
Make the orientation angle of the Lipstick window known
Add a getter for notification urgency
Make the volume key repeat faster
Bump version
Don't explicitly specify NGF sink to play feedbacks with
Bump version
Revert "Make the orientation angle of the Lipstick window known"

This reverts commit 9ee936ec475e2d0432d10080b11ecfd1c364b6ca.