moved CacheInfo to klepto.tools; better naming for generated CacheInfo class;
byref in dill.dumps to enable klepto.keymap.picklemap to generate unique key;
moved klepto version to 0.1a1 and require dill-0.2b2;
updated test_cache and test_cache_info to run silently and check with asserts


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/klepto@553 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/klepto