#172 Unwanted automatic alphabetical sorting

[JVE]

Headlines with the same timestamp are _unneccessarily_
sorted alphabetically. This is undesirable default
behavior, because ordering in most RSS feeds is
chronological and should be maintained.

This is especially critical when someone adds a new
feed. The current headlines all get the same timestamp,
and are then sorted out of chronological order(!).

It also happens when several items were added since the
last time that the user updated his feed. All those
items are grouped together and sorted alphabetically.

Please leave the items in the order they were read from
the RSS file (until acted upon by the user via a sort
option of some kind).