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.

--- a/scripts/general/interp1.m	Thu Jul 15 12:15:14 2010 +0200
+++ b/scripts/general/interp1.m	Sat Jul 17 19:53:01 2010 -0700
@@ -36,7 +36,7 @@
 ## @item 'linear'
 ## Linear interpolation from nearest neighbors
 ## @item 'pchip'
-## Piece-wise cubic hermite interpolating polynomial
+## Piece-wise cubic Hermite interpolating polynomial
 ## @item 'cubic'
 ## Cubic interpolation from four nearest neighbors
 ## @item 'spline'