Allow WikiWords to be ignored with <nop> or "''''".

Allow WikiWords to be ignored with <nop> or "''''".

* lisp/muse-mode.el (muse-browse-result): Docfixes.

* lisp/muse-wiki.el (muse-wiki-hide-nop-tag): New option that determines
  whether to hide <nop> tags when coloring a Muse buffer.
  (muse-wiki-wikiword-at-point): Docfix.
  (muse-wiki-colors-nop-tag): New function that colors <nop> tags.
  (muse-wiki-publish-nop-tag): New function that interprets <nop> tags
  during publishing.
  (muse-colors-tags, muse-publish-markup-tags): Interpret <nop> tags,
  which keeps the WikiWord that follows it from being interpreted.
  (muse-publish-markup-regexps): Allow 4 single quotes to function as a
  WikiWord delimiter.

git-archimport-id: mwolson@gnu.org--2005/muse--main--1.0--patch-84