Change-Id: I7742bd09f424f30862a5b49f4df508dfe643c6df

This fixes link errors on Windows with Infovis/Views off, and fixes
link errors on Linux with -Wl,--no-undefined.

Change-Id: Ifcee058b73c4dd22cf370a8f02cc974f6626d166

In Python, the QVTKInteractor class wasn't inheriting any methods
from its superclass vtkRenderWindowInteractor and was useless as
a result.  The python wrappers were confused because the prefix
is "Q" instead of "vtk".  The main kits have a vtkKitHierarchy.txt
file that the wrappers can use to ascertain type and inheritance
without relying on prefixes, a simple solution here is to use the
hierarchy file that was generated for Rendering.

Change-Id: Idba365ea61d7153dfd63f678dd36318ba429dc93

Change-Id: I3aed58d875bd7080d8e369769b476f59447fa5e5

The Clang 3.0 compiler is unable to link QVTK due to X symbols it cannot
find. The QVTKWidget::x11_setup_window() function makes calls to X, and
so if VTK_USE_X is defined we should be linking.

Change-Id: I9a8a4f18dd6c1b86892c078dd5e0054a79177866

VTK now exports all of its installed targets into a VTKTargets.cmake file. Inclusion of this file allows other projects to import VTK targets and reference them directly, in a simple and flexible manner.

Change-Id: Ifa501156a84be82fbc1e46de67e670de7ec2a99c

The wrapper language include paths have been split out of
the main VTK include path, so directories that need python
must now explicitly include the PYTHON_INCLUDE_PATH.

A new CMake option, VTK_USE_QTCHARTS, was added. This is off by default,
the Qt based charts will be removed in a future release.

Change-Id: I68ecac6ff08180c48518853f9774bf0cb979092a

Enhanced vtkWrapPython to recognized Qt types used in VTK classes.
Use SIP to wrap Qt classes for use with PyQt.
Also added bridge code to make VTK types work in Qt classes.

QVTKWidget2 is an alternative to QVTKWidget that may be used if
operations involving QPainter are desired.
Also exporting VTK_USE_QVTK_QTOPENGL configuration flag.

This was causing some issues on a Linux box for me, and we are not using
phonon directly. Restrict to just apple for now, where this was known to
cause problems.

Also making labels.py work again by using vtkQtInitialization.
This required moving vtkQtInitialization out of GUISupport so
it could be wrapped.