test we use form in list view. --ch10l022--
tiny bit of form in view_list. --ch10l023--
split out invalid tests for list view into 3. --ch10l024--
use form properly in final view. --ch10l025--
use form.errors in list.html. --ch10l026-1--
use form in list template. --ch10l026-2--
Use Danny's request.POST or None trick.  --ch10l027--