Log Message:
Import flexdock-1.2.4 as wip/flexdock.

FlexDock is a Java docking framework for use in cross-platform Swing
applications.  It offers features you'd expect in any desktop docking
framework such as:

    * Tabbed and Split Layouts
    * Drag-n-Drop capability (with native drag rubber band painting on
      some platforms)
    * Floating windows
    * Collapsible Containers to Save Real Estate
    * Layout Persistence