GEVER: changed `ftw.tika` version to 1.1.1.

Some changes in `ftw-buildout`, which the `opengever-buildout` is
based on, involve to use the newest `ftw.tika` version.
Merge pull request #14 from 4teamwork/gever_ftwtika_version

GEVER: changed `ftw.tika` version to 1.1.1.