Added new quicksort implementation, tailored to sorting arrays of object pointers.  Should be a bit faster than the C library's qsort(), and doesn't have the prohibition on recursion that Solaris qsort() has in the threaded version of their C library.
Added new quicksort implementation, tailored to sorting arrays of
object pointers.  Should be a bit faster than the C library's qsort(),
and doesn't have the prohibition on recursion that Solaris qsort() has
in the threaded version of their C library.

Thanks to discussions with Tim Peters.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator