Adding wrapping for DiffiomorphicDemons registration

Change-Id: I2fedbf8edfd7c31197edd5d1fdb6e92fdbd0f887
Adding basic enum check for diffeomorphic demons registration

Verifies that the ITK and SimpleITK enums have equivalent values.

Change-Id: Icfdb07e8ca82cc3fdb5dd795c5b8486f65b84d32
Adding basic test for diffeomorphic demons registration

Change-Id: Ic85eaefea99e61e1f930e262353feb67e2070dff
Merge topic 'SIMPLEITK-426_WrapDeformationFieldFilters' into next

2db98fac Adding basic test for diffeomorphic demons registration
00609450 Adding basic enum check for diffeomorphic demons registration
cba0346e Adding wrapping for DiffiomorphicDemons registration