BF: Few fixes for the tutorial related to the openfmri dataset

not all fixes yet...
Merge branch 'master' of github.com:PyMVPA/PyMVPA

* 'master' of github.com:PyMVPA/PyMVPA:
  BF: even more files to be installed
  RF: removed some unnecessary trailing "\" so to not confuse people
  BF+RF: "install" all the files from under mvpa2/data