DOC: adding manually adding doc strings to super class parameters

The JSONDocUpdate script does not extract documentation from super
classes. These fields have been manually copied from the ITK doxygen
pages.

Change-Id: I46587639c217fc1964f7689c39dd72b2391a7b6b
BUG: Add support for vector and complex difference image

When an image comparison fails a difference image is written to be
used on the dashboard. For complex and vector pixel types they are now
converted to scalar images.

Change-Id: I23169e8cbda281b6a4ea9b04fa38db08e9bbfb1c
BUG: fix template so false is a valid default value

The lua template conditional was false when the value of default was
false or nil.

Change-Id: I055d01d9a51d456d1ca8bd316f84dafd96159ba2
Set default number of iterations to match ITK

Change-Id: Ia4fb737d4fee52dea9b746e9b6f3c1cf7a4acd1c
fixup for the default update

Change-Id: I0542886bd5a86a56a25fe68bc0c501641376afa6
Re-ordered parameters for Demons based on usefulness and groupings.

Change-Id: I8887cc02c626cbf4d52c97c0b35d4d77f353f13e
Merge topic 'SIMPLEITK-426_WrapDeformationFieldFilters' into next

5b9e82d3 Re-ordered parameters for Demons based on usefulness and groupings.
e79aaf51 fixup for the default update
a6c41e89 Set default number of iterations to match ITK
63275dc3 BUG: fix template so false is a valid default value
6bd886db BUG: Add support for vector and complex difference image
8298779e DOC: adding manually adding doc strings to super class parameters