Apache Forrest code update (bug FOR-635)

code update
by
TS
(fixes bug FOR-635)

:
Images had not been reliably reproduced in PDFs (fop version
prior to 0.94). The old way always expected a physical URI (file or http) the new fop
URIResolver in the FOP-NG block delegates to Cocoon's SourceResolver framework,
meaning images can be the result of a pipeline.