Merge pull request #69 from Dannon/master

Remove mock, nose from 'install_requires'.
When grabbing cluster's PD, do so only for CloudMan buckets
Merge ../bioblend_dannon
Merge from bioblend_dannon
Swap to stdlib json since the library is 2.6+.
Merge pull request #70 from Dannon/simplejson_to_json

Swap to stdlib json since the library is 2.6+.
Merge.