doc: Add @nospell macro around proper names in documentation. * aspell-octave.en.pws: Remove proper names from Octave's custom dictionary. * doc/interpreter/audio.txi, doc/interpreter/diagperm.txi, doc/interpreter/diffeq.txi, doc/interpreter/emacs.txi, doc/interpreter/func.txi, doc/interpreter/geometry.txi, doc/interpreter/intro.txi, doc/interpreter/linalg.txi, doc/interpreter/numbers.txi, doc/interpreter/preface.txi, doc/interpreter/quad.txi, doc/interpreter/sparse.txi, libinterp/corefcn/colloc.cc, libinterp/corefcn/ellipj.cc, libinterp/corefcn/gammainc.cc, libinterp/corefcn/hess.cc, libinterp/corefcn/quadcc.cc, libinterp/corefcn/rand.cc, libinterp/corefcn/sqrtm.cc, libinterp/dldfcn/ccolamd.cc, libinterp/dldfcn/colamd.cc, libinterp/dldfcn/dmperm.cc, libinterp/dldfcn/symrcm.cc, scripts/general/quadgk.m, scripts/general/quadl.m, scripts/linear-algebra/commutation_matrix.m, scripts/linear-algebra/condest.m, scripts/linear-algebra/duplication_matrix.m, scripts/linear-algebra/expm.m, scripts/linear-algebra/housh.m, scripts/linear-algebra/krylov.m, scripts/linear-algebra/onenormest.m, scripts/linear-algebra/qzhess.m, scripts/optimization/fminsearch.m, scripts/optimization/glpk.m, scripts/signal/arch_fit.m, scripts/signal/bartlett.m, scripts/signal/blackman.m, scripts/signal/diffpara.m, scripts/signal/durbinlevinson.m, scripts/signal/hamming.m, scripts/signal/hanning.m, scripts/sparse/eigs.m, scripts/sparse/pcg.m, scripts/sparse/pcr.m, scripts/specfun/ellipke.m, scripts/special-matrix/gallery.m, scripts/special-matrix/invhilb.m, scripts/statistics/base/quantile.m, scripts/statistics/tests/kruskal_wallis_test.m, scripts/statistics/tests/manova.m, scripts/statistics/tests/mcnemar_test.m: Add @nospell macro around proper names in documentation.

--- a/doc/interpreter/numbers.txi	Thu Aug 21 18:49:47 2014 +0100
+++ b/doc/interpreter/numbers.txi	Thu Aug 21 15:57:18 2014 -0700
@@ -311,11 +311,11 @@
 @subsection Empty Matrices
 
 A matrix may have one or both dimensions zero, and operations on empty
-matrices are handled as described by Carl @nospell{de} Boor in @cite{An Empty
-Exercise}, SIGNUM, Volume 25, pages 2-6, 1990 and C. N. Nett and W. M.
-Haddad, in @cite{A System-Theoretic Appropriate Realization of the Empty
-Matrix Concept}, IEEE Transactions on Automatic Control, Volume 38,
-Number 5, May 1993.
+matrices are handled as described by @nospell{Carl de Boor} in
+@cite{An Empty Exercise}, SIGNUM, Volume 25, pages 2-6, 1990 and
+@nospell{C. N. Nett and W. M. Haddad}, in
+@cite{A System-Theoretic Appropriate Realization of the Empty Matrix Concept},
+IEEE Transactions on Automatic Control, Volume 38, Number 5, May 1993.
 @tex
 Briefly, given a scalar $s$, an $m\times n$ matrix $M_{m\times n}$,
 and an $m\times n$ empty matrix $[\,]_{m\times n}$ (with either one or