Accessible IPTV Client for iOS 0.1.8

• This build measures the slow category switch. When a category change or a list load takes more than a second, the status line now says what it cost: the time before the list was shown, how many rows the list built, and how many times the screen redrew. Temporary, and it goes away once the cost is known.
• The guide lookup that a channel row makes is remembered for half a minute, so a redraw or a scroll over a list of live channels no longer runs the same query for every row again.