Added support for C library SnowBall PyStemmer (http://snowball.tartarus.org) alongside Pythonic Porter algorithm.
Added support for C library SnowBall PyStemmer (http://snowball.tartarus.org)
alongside Pythonic Porter algorithm.

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