Added py::String operator*= and operator* for repetition
Change Dict::items(), keys(), and values() to return a List
Added template versions of set_item, etc., methods so that users can optionally
use C++ types that have to_python() functions as parameters.
Changed various Ptr by-value parameters to const Ptr&
[SVN r8187]
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]
