enable better hashing and syncd keys for dir_archive cache and archive;
add _fname, _hasinput, _getkey, and _args to dir_archive; add relevant test


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/klepto@706 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/klepto