[LyX/master] DocBook: better output with the Linguistics module.

[Thibaut Cuvelier]

commit 08a58242c157868efc5b3d52577e09f898725198
Author: Thibaut Cuvelier <tcuvelier at lyx.org>
Date:   Wed Sep 2 00:46:08 2020 +0200

    DocBook: better output with the Linguistics module.
    
    One issue left: <table> output within an <informaltable>, that does not make sense... I'm debugging it.

 autotests/export/docbook/Linguistics.lyx | 3209 ++++++++++++++++++++++++++++++
 autotests/export/docbook/Linguistics.xml |  339 ++++
 lib/layouts/linguistics.module           |    8 +
 src/Floating.cpp                         |    5 +-
 src/output_docbook.cpp                   |    6 +-
 5 files changed, 3563 insertions(+), 4 deletions(-)