Clean-up addition of CSS and JS

First, we're misusing hook_library by adding our module-specific CSS to it.
Second, drupal_add_library('system', 'farbtastic'); includes both JS and CSS, so no need for the extra function.
Third, in cleaning that up I realized we can be using ctools_add_css and ctools_add_js, since Views now depends on CTools. It really makes things easier to read.