download feed option messing up form submission

When download all items in the feed option is selected the blog fails to be assigned the pathauto url, content_type table fails to be updated and a bunch of other issues. This is because the function simplefeed_feed_refresh() does a drupal goto. This causes tons of issues for form submissions. I have added an extra param to that function that says redirect or no. But perhaps we should consider a menu callback like this:

This I think is better because it keeps simplefeed_feed_refresh as an api function (BIG ++) instead of using it as a page callback. See attached patch for the first, not so great solution