Adding json to generate initial code for CenteredTransformInitializer

Change-Id: Idf8ec3245a32e7c36ebd038b7b99af468c10a353
WIP adding stuff
Renaming CenterTransfromInitializer with filter suffix
Modifying the generated code for the CenterTransformInitializer

Making the output type be Transform. Renaming the class to have the
Filter suffix with the procedural method is the name of the itk class.

Change-Id: Ib9a19c7b64f982b84879737ad29c7d5617da5451
Adding generated CenteredTransformInitialization filter

This is just was the code generation created and needs to be
corrected.

Change-Id: Ib9a19c7b64f982b84879737ad29c7d5617da5451
Adding test for centered transform initializer

Change-Id: I64e6a7e3dcab48a3344f37fc4f11c5a086c50dd4
Fixing name of Moments and removing leading white space

Change-Id: Ic36d84ea41bc7bab5dce5a6d2727a22ba2b665b3
copy input to CenteredTransformInitializer

ITK's non-process object centered transform initializer modifies it's
inputs. Perform a implicit deep copy in SimpleITK to ensure the input
of the SimpleITK filter is not modified.

Change-Id: I5e959c74a438e8fd5141be1dddd54b1b067bfa5b
Merge topic 'AddCenteredTransformInitializer' into next

928b42e7 copy input to CenteredTransformInitializer
4a700e18 Fixing name of Moments and removing leading white space
1a81785e Adding test for centered transform initializer
601e95d5 Adding generated CenteredTransformInitialization filter
58579fbb Modifying the generated code for the CenterTransformInitializer
4ac3c4a6 Renaming CenterTransfromInitializer with filter suffix
d74a1f81 WIP adding stuff
dec46592 Adding json to generate initial code for CenteredTransformInitializer