Support multiple text-match elements within a filter query.

For all PARAM-FILTER that can not be evaluated in SqlFilterFragment, the evaluation has to be performed on the AWL objects. TEXT-MATCHes may not only check whether the search string is part of the parameter, but the user can request more specific tests like starts-with, ends-with and further the checks must not necesarrly be case-insensitive.
See section 9.7 of:
http://www.ietf.org/rfc/rfc4791.txt