doc: Add missing functions to manual. * doc/interpreter/doccheck/mk_undocumented_list: Mark 'end' as an exception not required to be in manual. * doc/interpreter/gui.txi: Add isguirunning() and desktop() to list of GUI utility functions. * doc/interpreter/octave.texi: Add new subsection "Missing Components" to menu. * doc/interpreter/package.txi: Add "Missing Components" section with DOCSTRING reference for missing_component_hook(). * libinterp/corefcn/variables.cc: Add seealso links between missing_component_hook() and missing_function_hook(). * libinterp/parse-tree/pt-arg-list.cc(Fend): Write docstring for 'end' index keyword.

--- a/doc/interpreter/octave.texi	Thu Oct 24 17:13:02 2013 -0400
+++ b/doc/interpreter/octave.texi	Thu Oct 24 14:44:23 2013 -0700
@@ -795,6 +795,7 @@
 * The DESCRIPTION File::
 * The INDEX File::
 * PKG_ADD and PKG_DEL Directives::
+* Missing Components::
 
 External Code Interface