BibConvert: lxml support for local document()
- Adds support for document() usage in XSLT stylesheets for the lxml processor. (PR #2497)
- Removes Exception masking.
Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>