#193333 by quicksketch et al: taxonomy drag and drop support

includes/common.inc

misc/tabledrag.js

modules/comment/comment.install

modules/forum/forum.admin.inc

modules/forum/forum.module

modules/locale/locale.install

modules/system/system.install

modules/taxonomy/taxonomy.admin.inc

modules/taxonomy/taxonomy.css

modules/taxonomy/taxonomy.js

modules/taxonomy/taxonomy.module

themes/garland/fix-ie.css

themes/garland/style.css