Add spellchecker scripts for Octave and run spellcheck of documentation interpreter/doccheck: New directory for spelling/grammar scripts. interpreter/doccheck/README: Instructions for using scripts. interpreter/doccheck/spellcheck: Script to spellcheck a Texinfo file. interpreter/doccheck/aspell.conf: GNU Aspell configuration file for Octave documentation. interpreter/doccheck/aspell-octave.en.pws: Private Aspell dictionary. interpreter/doccheck/add_to_aspell_dict: Script to add new Octave-specific words to private Aspell dictionary. interpreter/octave.texi: New @nospell macro which forces Aspell to ignore the word marked by the macro. interpreter/mk_doc_cache.m: Skip new @nospell macro when building doc_cache.

Things to do before making a release:

  * Ask testers for the type(s) of machines they are using.

  * Update the version number in src/version.h.

  * Update the version number in doc/refcard/refcard.tex.

  * Add a `Version M.N.P released.' line to the ChangeLog.

  * Update the NEWS file.

  * Check the README file.

  * Run autoconf, autoheader, and configure before making tar files.

  * Update the NEWS and README.octave files in the anonymous ftp
    directory.