aim for standard FlyingSaucer library

[plutext]

FlyingSaucer is reinvigorated over recent years.

It would be good to get the benefit of its improvements, and potentially, to include toDocx in FS itself, so that a patched FS is no longer required.

See also https://www.docx4java.org/forums/xhtml-import-f28/library-question-t2249.html

[plutext]

A version of FlyingSaucer current against upstream (ie to Jan 2018), but with docx code is at https://github.com/plutext/flyingsaucer/tree/FS2018-YellowfinBI/flying-saucer-docx

A version of docx4j-ImportXHTML which uses this, may be found at https://github.com/plutext/docx4j-ImportXHTML/tree/FS2018

I would like to release a new docx4j-ImportXHTML v3.4.0 based on the FS2018 branch.

But to do that the changes in plutext/flyingsaucer/tree/FS2018-YellowfinBI need to be accepted upstream, and pushed to Maven Central as a new version (which we can use as our dependency).

So next step is to make a pull request.

[plutext]

See now flyingsaucerproject/flyingsaucer#138