Fixes small python3 compatibility issue
added _matchlambda for better lambda behavior in closures


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/dill@647 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/dill
Merge pull request #37 from matsjoyce/py3_source

Fixes small python3 compatibility issue in dill.source