Move as much code as possible to Pipeline and Liblouis

[bertfrees]

Braille translation

• Handling of text-transform: uncontracted in NotaTranslator can be dropped because it is now handled in standard Pipeline.
• Emphasis should be handled by Liblouis. I'm not sure why this is not already the case. Related: Restrict conversion of emphasis #8.
• Language should be handled in CSS. See Replace language handling in XSLT with CSS #7. The required CSS seems already added, but there is also still XSLT code present.
• If the above items have been solved, block-translate.xsl and NotaTranslator can be removed.

Style sheets

• Certain bits of code that are not specific to Nota (if generalized) could be moved to Pipeline:
  • Tables: see NLB
    • There could also be an option to create multiple version of a table, with different layouts. Upon checking the result the user can than decide which variant is the best. (This is currently done in duplicate-tables.xsl.)
  • Notes: see NLB
    • Noterefs are currently replaced with the note elements that they reference (mark-noterefs.xsl), so that the ::footnote-call approach can be used to lay out the notes. But there also exists an alternative to lay out notes (with ::alternate and target-content()). If possible we should use this simpler alternative (requires no XSLT).
  • Table of contents: see SBS
  • Images: see NLB
  • Print page break indication: see NLB