Updated iOS 6-style icons

NOTE: These were created by taking screenshots of a square yellow icon with
      iOS's rounding, gloss, and shadow effects applied by the system, and
      then adding the "warning" sign image on top.
NOTE: A retina iPad was not available, so the background used for the
      icon-72@2x.png icon is actually a scaled-up version of the icon@2x.png
      icon.
FIXME: Add a true retina icon for retina iPad devices.
Added source design files for icons
Updated launch images

NOTE: Added launch images for iPad.
FIXME: Add launch images for iPad (retina) iOS 6.
Modified bundle plist to enable iPad support
Updated title for root view controller
Updated style of "view * log" buttons on iOS 6