initial merge of klepto.archives.dict_archive; added klepto dependency on pox;
added compression and memmap capacity for dir_archive; added two klepto tests;
uptick pox version to 0.2a1; added likely_import and namespace to pox;
updated klepto README for new features and requirements


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/klepto@580 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/klepto