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This commit makes it possible to make custom clients based on ParaView. There
are a host of changes in this commit that restucture the Qt client level
classes.

For more details refer to the following links:

http://www.paraview.org/ParaView3/index.php/ParaView-based_Applications

http://www.paraview.org/Wiki/Writing_Custom_Applications

ENH:  Improve error handling when testing with python.

BUG:  Rewrite thread sync-ing code in hopes to prevent deadlock on Windows.
      Replace mutexes on both threads with a wait condition on the python thread.

ENH:  Integrate Python testing framework with ParaView.  If testing with python
      is enabled, the play/record menus/dialogs give python as an option.

      It currently can query any QObject property and in python you can compare
      it to a known value.  Just throw an exception if the test fails.
      It can also take snapshots of arbitrary widgets and compare them to
      baselines.

      Also added a test that loads a histogram and takes a snapshot of the
      histogram widget and compares it to a baseline.

ENH:  Add ability to record/playback a python script.
      Also add ability to query QObject properties from python.

ENH:  New directory structure

Update CMake scripts to work with the restructured repository.

A new CVS repository was created on 2006-03-22 to re-organize the
ParaQ source tree into a layout similar to that of ParaView 2.x and
drop the Tcl/Tk GUI.  This was in preparation for the final transition
to the Qt-based GUI as the official ParaView 3.0 GUI.  This commit was
manufactured during conversion from CVS to represent the layout change
as part of the first commit to the new repository.

COMP: ParaQ builds successfully using shared libs on Win32 (required to support PVS Python wrappings)

ENH: pqEventPlayerXML reports errors to callers

BUG: About box implementation interfered with test case playback
ENH: Consistent naming of menu actions for test case recording
ENH: pqSetName, pqSetData, and pqConnect components enable easy menu generation without lots of temporaries

STYLE: Yet another round of style updates, undoing some mistakes

This commit was manufactured as the start of QtTesting when splitting
its history out from the ParaView Qt/Testing directory.  The content
came from ParaView commit c1620c50ee6410c491651f8618c0d21cb3796368.