Merge branch 'SIMPLEITK-345_AddOutputPixelTypeToImageReaders' into SIMPLEITK-426_WrapDeformationFieldFilters

Change-Id: I36bf96143a8b013796696722dea338945b1b6626
Use output pixel type parameter on reader

Change-Id: I13b9a9c045e1147c0b4a697f04a19f6cc666e86a
Adding DeformableRegistration1.cxx as a test

Change-Id: I3ae0e604ab6da212074566180596734bba145dc8
Adding DeformableRegitration1 example for python

Change-Id: Id26d396167d1f20274977ce5b6eacf73e911823d
Improve DeformableRegistration1.cxx example

Actually run the histogram matching filter. No longer need the cast
for the deformation filed type, and make the output better match the
other registration examples.

Change-Id: Ic86f200093242888be03c68f0343f8e023892360
Merge topic 'SIMPLEITK-426_WrapDeformationFieldFilters' into next

732b6084 Improve DeformableRegistration1.cxx example
e1cb9ce6 Adding DeformableRegitration1 example for python
de46c5fb Adding DeformableRegistration1.cxx as a test
8966f781 Use output pixel type parameter on reader
f3e267aa Merge branch 'SIMPLEITK-345_AddOutputPixelTypeToImageReaders' into SIMPLEITK-426_WrapDeformationFieldFilters