Change named arg varmode to mode for consistency, and add an argument for number of contours in density on grid
Change named arg varmode to mode for consistency, and add an argument for number of contours in density on grid

git-svn-id: 003f22d385e25de9cff933a5ea4efd77cb5e7b28@3124 d6536bca-fef9-0310-8506-e4c0a848fbcf

lesserwhirls/scipy-cwt,jasonmccampbell/scipy-refactor,scipy/scipy-svn,lesserwhirls/scipy-cwt,scipy/scipy-svn,jasonmccampbell/scipy-refactor,scipy/scipy-svn,lesserwhirls/scipy-cwt,jasonmccampbell/scipy-refactor,scipy/scipy-svn,lesserwhirls/scipy-cwt,jasonmccampbell/scipy-refactor