The following comment were executed:

pip install autopep8
autopep8 --in-place --max-line-length=150 -r .


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Rational copied from https://www.python.org/dev/peps/pep-0290/#testing-for-none

// -----------------
Since there is only one None object, equality can be tested with identity. Identity
tests are slightly faster than equality tests. Also, some object types may overload
comparison, so equality testing may be much slower.

Pattern:

if v == None  -->  if v is None:
if v != None  -->  if v is not None:
// -----------------


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* Use spaces instead of tab
* Add missing new lines
* Remove trailing spaces
* Add missing spaces
* Remove redundant backslash between brackets


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This commit fixes the following error:

```
[...]
-- Found Qt4: /home/jcfr/Support/qt-everywhere-opensource-build-4.8.7/bin/qmake (found version "4.8.7")
CMake Error at src/Cxx/Qt/CMakeLists.txt:64 (TARGET_LINK_LIBRARIES):
  Cannot specify link libraries for target "BorderWidgetQt" which is not
  built by this project.
[...]


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Change data from Hawaii to honolulu.vtk. Also removed
ren->Render()'s. They were causing crashes.


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