Moved the line "from __future__ import generators" to be the first statement  of the file in order to correct a syntax error in Python 2.5.1, which  complained that from __future__ imports had to be at the beginning of the  file.
Moved the line "from __future__ import generators" to be the first statement
 of the file in order to correct a syntax error in Python 2.5.1, which
 complained that from __future__ imports had to be at the beginning of the
 file.

tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio