Adding rough json file to generate initial code

Change-Id: I96a1c3b04ab10b02d846a60d31b66e11f7cf0079
Adding initial generate code from json
Rename initial generated files
Modify generate code for BSplineTransformInitializerFilter

The generated class BSplineTransformInitalizer has been renamed with
the filer suffix. It now returns a BSplineTransform. And the Internal
Execute method has been updated to execute the non-filter object.

Change-Id: I23019cef01f9b89c0722def63872418629ed80c8
Adding testing for the BSplineTransfromInitalizerFilter

Change-Id: I1fcedad7abfa6db474a6202e487527a763a4fd20
Merge topic 'SIMPLEITK-538_AddBSplineTransformSpecificInterface' into next

c678da7c Adding testing for the BSplineTransfromInitalizerFilter
72517420 Modify generate code for BSplineTransformInitializerFilter
35338d98 Rename initial generated files
32cac192 Adding initial generate code from json
f51efddb Adding rough json file to generate initial code