Updated support email address
Existence of stale file should not block normal layout file processing

NOTE: This change fixes a bug where the layout would be reset to defaults when
      both IconSupport and a dependent package were installed at the same time
      (not sequentially) on a device that had an old layout file.
      The reason this would occur was because when a stale file was found,
      creation of IconSupportState.plist was being blocked, and so SpringBoard
      was told to use a file that did not (yet) exist.
Updated for release (v1.9.1)