Merge pull request #6 from CaliOpen/develop

Develop
naming consistency: do not use <object>_type only type
consistency and no more <object>_type
Merge pull request #7 from gdchamal/return_object

Return object
some missing attributes label
base storage interfaces documentation using sphinxcontrib-zopeext
change doc build dir
data and index interfaces docstrings
add documentation for index interface in toc
consistent wording and cleaning of doc structure
mainly attribute doctstring, but also add expire_date on ContactPublicKey, btw
Merge pull request #8 from gdchamal/doc_interface

Doc interface