moved code that writes imports in klepto.archives to klepto.archives._import;
_import code chooses not to import from __main__; more cleaning of _import;
correctly handle str(obj.__class__) in pox.utils.likely_import;
handle lambdas and sometimes None in likely_import, also fix recursive issue;
dill.source._get_name to dill.source.getname; pox optionally uses dill


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/klepto@589 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/klepto