* Explicitly import pure, (<$>), (<*>) and (<$) from Control.Applicative.
* Use DeriveDataTypeable pragma.
* Remove type signature from pattern synonym.
The layout now maintains a list of windows that never have borders, and
a list of windows that always have borders. Use 'BorderMessage' to
manage these lists and the accompanying event hook ('borderEventHook')
to remove destroyed windows from them. Also provides the 'hasBorder'
manage hook.
Two new conditions have been added to 'Ambiguity': 'OnlyLayoutFloat' and
'OnlyLayoutFloatBelow'; 'OnlyFloat' was renamed to 'OnlyScreenFloat'.
See the documentation for more information.
Now smartBorders shows borders when you have multiple screens with one window
each. In the case where only one window is visible, no borders are drawn.
This removes the emptyLayoutMod method from the LayoutModifier class, and
change the Stack parameter to redoLayout to a Maybe Stack one. It also changes
all affected code. This should should be a refactoring without any change in
program behaviour.
