fix: correctly build BufferType and is not pickleable;
added more correct set of FileTypes (e.g. open with mode='rb' and buffering)
cleaned out unnecessary types from dill.py (e.g IntType. ComplexType)
build BytesType with latin encoding codecs


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/dill@542 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/dill