Add repr() function to Class<T>
Add to_python/from_python conversions for PyPtr<T>
Standardize set_item/get_item interfaces (instead of proxies) for Dict and List
Add Reprable<> template to newtypes.h
Fix a bug wherein the __module__ attribute would be lost for classes that have a default virtual function implementation.
[SVN r8091]
- declares a wrapped C++ class to be a base class of another wrapped class
- enables conversions between those classes
- ensures that base class methods are inherited by the subclass
[SVN r7971]
