[mythtv] Updates for Master_iconmap - Chicago

[Matt]

Daniel,

   I submitted a new ticket (http://svn.mythtv.org/trac/ticket/2934)
that includes some minor changes in addition to your last changes
(12552).

It includes the generic ITV logo as well as the custom logos for both
the Seattle and Chicago ITV affiliates.  In addition, it fixes some
minor typos I've found.

Thanks!
Matt