Add Python 2.6 patches
set version to 1.0.1, update changelog
Fix _tracemalloc on Python 2.6

PyFrame_GetLineNumber() was added to Python 2.7
Port tracemalloc to Python 2.6

Backport functools.total_ordering from Python 2.7.
Port test_tracemalloc to Python 2.6

Backport assert_python_ok() and assert_python_failure() of
test.script_helper from Python 2.7.
changelog