retrieve STL containers from table types

This release adds some minor fixes and adds a new type of getter -- one for stl-containers that are associative and non-associative.

This release also fixes some issues with usertype inheritance, though keep in mind that is still officially unsupported and undocumented and should be used with caution (since the performance can degrade linearly with the 'class distance' from derived to bases).

Another issue with using certain kinds of wrapped pointers are managed types were also fixed here.