add shebang line and docstring to python templates Changed: U trunk/Bundles/Python.tmbundle/Templates/Python Class/template_in.txt U trunk/Bundles/Python.tmbundle/Templates/Python Script/template_in.txt U trunk/Bundles/Python.tmbundle/Templates/Python Script with Args/template_in.txt U trunk/Bundles/Python.tmbundle/Templates/Python Unittest/template_in.txt