wxPython Classic

The term "wxPython Classic", or just "Classic" is used to refer to the old version of wxPython, before ProjectPhoenix. Although they are mostly compatible at the programmer's level, Phoenix is a fundamental change in how wxPython is created and how the foundational pieces work at runtime, so it makes sense to have an easy way to distinguish between the two. In addition, there is a significant overlap between the two where both versions are available, so having two names helps to reduce the confusion.