— no longer say that Dynare is limited to 3rd order
— drop obsolete internal documentations of numerical integration and k-order
  modules
— update the remaining PDFs

This is a revert 683011b4.

Actually, the official name is “GNU Octave”, and it is easier to find it under
that name in search engines. So use the full name at a few prominent places,
and use the shorter “Octave” everywhere else.

— the file is now created on the fly by the CI
— rewrite the RDF→YAML conversion script in Bash
— fix a bug that was leading titles of some papers to be truncated

Rather mention Windows 8.1.