Bugfix: updating a title when removing a Dockable from a
StackDockStation could cause an exception, the listener that observers
the title-event is now removed earlier.
Added the new DockComponentConfiguration with which clients can
configure Components directly.
Fixed compiler issues
Bugfix: SideSnapDropLayer did always expect that its Component is at
location 0/0.
Fixed a ConcurrentModificationException
Made the example a bit better: the size of a Dockable should no longer
change when it is moved around.