Simple class views have a unicode name

When you create a simple class view a new type is created with a __name__ attribute. Unfortunately this is set to a unicode name, which can create subtle problems in Zope(2) where ids must be str instances and many pieces of code try to join ids. The bug is in Products.Five.metaconfigure: in code paths that call makeClass() the name is converted to a str by makeClass(), but makeClassForTemplate() does not do that and will create classes with a unicode __name__.