Replace cellfun() occurrences with faster code where possible. * scripts/help/doc_cache_create.m: Use built-in "isclass" rather than ischar. Use addpath and rmpath with multiple inputs rather than cellfun. * scripts/image/imformats.m: Use isfield with cell string list rather than cellfun. * scripts/image/private/__imread__.m: Use ismember to replace cellfun/strcmpi combo. * scripts/miscellaneous/what.m: Re-order if/elseif tree. * scripts/pkg/private/rebuild.m: Replace cellfun with strcat call. * scripts/plot/axis.m: Use comma-separated lists to replace cellfun. * scripts/plot/pareto.m: Use cellstr on char array to replace cellfun. * scripts/plot/private/__gnuplot_print__.m: Use @times, rather than anonymous function, in cellfun call. * scripts/plot/private/__line__.m: White space cleanup. * scripts/plot/private/__patch__.m: Use ismember to replace cellfun/strcmpi combo. Use in-place '|=' operator for performance. * scripts/plot/struct2hdl.m: Use ismember to replace cellfun/strcmp combo. * scripts/polynomial/splinefit.m: Use built-in "isclass" rather than ischar. * scripts/special-matrix/gallery.m: Remove anonymous functions inside cellfuns. * scripts/strings/strsplit.m: Correct comment character to '#' from '%'. * scripts/strings/untabify.m: Use multiple argument form of cellfun to get rid of anonymous function. * scripts/testfun/__run_test_suite__.m: Remove anonymous function from within cellfun. * scripts/ui/inputdlg.m: Use built-in "isclass" rather than ischar.