doc: Update refcard.tex content from Octave 3 to Octave 8 refcard.tex: Remove Readline material, expand Octave examples. The intended audience of this reference card is someone who already knows programming in a different language like Python and is referring to this refcard.ps / refcard.pdf for Octave syntax. It is not a comprehensive reference, but gives enough function names to be useful with help / doc. Intended length 2 pages.

Name: @PACKAGE_NAME@
Description: C++ interface to GNU Octave interpreter.
URL: https://www.octave.org
Version: @PACKAGE_VERSION@
Requires: octave = @PACKAGE_VERSION@
Requires.private:
Libs: -L@octlibdir@ @LIBOCTINTERP@
Libs.private:
Cflags: -I@octincludedir@/..