fix small merging bug in 2.7 version where gcc complains (OS X)
merged the new 3.3 python version. (needs testing)
merged the new 2.7.5 python version. Very tiny.
Still not clear why the added globals do not appear.
most complete compatibility by using the __all__ from the imported modules
Merge branch 'master' of https://github.com/ctismer/zodbpickle