remove unnecessary Type(...) wrapping
cleanup the docklayout implementation

This removes the [as|from|_dict methods and now relies on the fact that
the layout is pickable for serialization.

It also makes use of the (now performant) typed atom lists for
validation.
request a relayout after shuffling items

The Object class will not emit a child event since no children have been
added or removed. So, an explicit layout request is required.
update error message string
update docstring
set margins on the layout instead of the widget.
set margins on the widget instead of the layout

The QFrame base class may reset the widget margins at run time. Applying
margins to the layout is the safer way to ensure that they don't get
changed out from under us.
apply the normal state at proper times

This updates QDockContainer and QDockWindow to revert to the normal
"showNormal" geometry state when being reset.
cleanup unused import
update handling of maximized entities

This updates the manager to properly save and restore layout state for
maximized items. It also disallows docking onto a dock area with a
maximized item in order to maintain an intuitive user experience.
handle docking onto a maximized container

when creating a new floating dock area by docking onto floating
container, restore the original container and maximize the newly created
dock window.
update the readme to reflect dependencies
update the guide icons to remove rounded edges
Add a utils module with a style repolish function
Add 1px darker border on floating dock windows
Code cleanup and add "floating" dynamic property

Move the maximize testing to a more appropriate place.

Add a "floating" dynamic property which is true when the container is a
free floating window. The style is repolished when it is set to allows
styling from a stylesheet.
update the handling of floating items.

Move floating items into a separate list on the docklayout. This way is
easier to understand and easier to code against.
Update layout handling

Update the manager to work with the new docklayout semantics.

Ensure that a maximized dock item is restored before redocking a
floating dock area.
put the onus of closing the window on the dock manager
Remove the destroy method

The dock manager is responsible for cleaning up dock frames.