The library is installed in ure/lib. Thanks Stefan Bergman for the pointer.

...which required some Reference namespace clean up.

...also improved the code somewhat.

SwDoc::MakeFlySection: abuse the SwDoc::mbRedlineMove flag, which
(with the fix for fdo#40599) does exactly what is necessary to prevent
the spurious copies.
Also, remove the ugly hack to work around this problem from
SwXText::convertToTextFrame.