added favorite beatle poll
make sure IndexView::get_queryset() does not include polls created using future times
Add some view tests, to make sure the list view only shows recent polls that are not in the future.
These need:
from django.core.urlresolvers import reverse
and a poll creator made to streamline creating polls having creation dates with various deltas from "now",
to make the view tests easier to write
make sure detail view won't show future polls
add tests for detail view: future polls shouldn't be showable, past polls should