fix URL of web link opened when an item is found

When the script found a new item and opened the browser, the page
it opens would often be missing the "send me this item" button.

Signed-off-by: Timur Tabi <timur@tabi.org>
print all new items found, and with timestamps

It's possible for there to be more than one new item found, so
don't stop after finding the first one.

Also display a timestamp so that people can see when the new
item was added, if they're not around when it appears.

Signed-off-by: Timur Tabi <timur@tabi.org>