DOC: Restore causality
Merge branch 'master' of github.com:PyMVPA/PyMVPA

* 'master' of github.com:PyMVPA/PyMVPA:
  RM: removing untested/unused ismooth
  ENH: boost pymvpa_hdf5_version (and use string) and store __pymvpa_version__ as well
  BF(workaround): for introduced since 2.2.0 release pass_attr - define also at class level
  BF: for the HDF5 storage, we are doomed to stay consistent also with public/private attributes
  RF+MSC: switch off pickling of internal surface objects, because in the current implementation this comes with a significant speed penalty. TODO: see if these can be stored more efficiently
Some bits to centralize import logic in HDF5

and deal with weired cases of our own history.
Merge pull request #211 from hanke/hdf5_history

Some bits to centralize import logic in HDF5