ENH: use print function in ModuleWizard for compatibility

As reported by Alexandre Abbas, the use of the print statement
means that the ModuleWizard is incompatible with python3.
See, for example [1].  Since we want to let people develop
scripted modules against a binary build of slicer, we should
try to make the module wizard as general purpose as possible
so people can use any python they have installed.

[1] http://www.python.org/dev/peps/pep-3105/

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21647 3bd1e089-480b-0410-8dfb-8563597acbee