po: update French translation
po: update Japanese translation
Manual de Blitz: Recent xc logo on top of each page.
Manual en flash: Finalized first effort on that.
- pdf-index cleaned up (-\pdfbookmark)
- after flight check added
- massively using refined menu boxes
- unnecessary header lines commented out
- some typos fixed.
Manual en: AE/BE typos.
Manual de Blitz: Reduced to a one file project.