ENH: Add MetaDataObject wrapping with Matrix

Needed to convert image to xarray. Dict method on image
fails without these wrappings.

Author: PranjalSahu

Modules/Core/Common/wrapping/itkMetaDataObject.wrap

@@ -1,5 +1,6 @@
 itk_wrap_include("itkArray.h")
 itk_wrap_include("<vector>")
+itk_wrap_include("itkMatrix.h")
 
 itk_wrap_class("itk::MetaDataObject" POINTER)
   itk_wrap_template("D" "double")
@@ -17,4 +18,6 @@ itk_wrap_class("itk::MetaDataObject" POINTER)
   itk_wrap_template("vectorD" "std::vector< double >")
   itk_wrap_template("vectorvectorF" "std::vector< std::vector< float > >")
   itk_wrap_template("vectorvectorD" "std::vector< std::vector< double > >")
+  itk_wrap_template("matrixD33" "itk::Matrix< double, 3, 3 >")
+  itk_wrap_template("matrixF44" "itk::Matrix< float, 4, 4 >")
 itk_end_wrap_class()

Modules/Core/Common/wrapping/test/itkMetaDataDictionaryTest.py

@@ -30,4 +30,9 @@
 print(md["double"])
 
 # Required for "NRRD_measurement frame"
-itk.MetaDataObject[itk.vector[itk.vector[itk.D]]].New()
+md1 = itk.MetaDataObject[itk.vector[itk.vector[itk.D]]].New()
+print(md1)
+
+# Required for "qto_xyz" metadata
+md2 = itk.MetaDataObject[itk.Matrix[itk.F, 4, 4]].New()
+print(md2)