The motivation here is that when it comes to date or author, the typical metata for the Writer document won't match the metadata of the book the file represents, so allowing a custom override as part of EPUB export makes sense.
Change-Id: I19aaed83ae0e69bc0dfa3084e1c9dc9cc534328f Reviewed-on: https://gerrit.libreoffice.org/45553
ee74bd73856c EPUB export: add UI to set custom metadata
writerperfect/qa/uitest/epubexport/epubexport.py | 26 ++
writerperfect/source/writer/EPUBExportDialog.cxx | 24 ++
writerperfect/source/writer/EPUBExportDialog.hxx | 5 +
writerperfect/uiconfig/ui/exportepub.ui | 399 ++++++++++++++++++-----
4 files changed, 364 insertions(+), 90 deletions(-)