Fix double transform for items ignoring parent transformations.

Previously, the topmost untransformable's scene transform, which
includes the item's position and local transformation, was used to
determine the item's anchoring position. This position was then
passed on to be multiplied by the item's transform again. This
works fine for toplevel untransformable items that don't have any
transform set at all, but those who do would have their transforms
applied twice - one to determine the anchoring position, and again
to transform the item itself. Since only translation transformations
can affect the first operation (the anchoring pos), this bug only
applies to items that set ItemIgnoresTransformations and use a
local transform that includes translation.

Task-number: QTBUG-21618
Change-Id: I3f3c4f2357e2ca6cd0c75cb5b7e428c0803d9e73
Reviewed-by: Alexis Menard <alexis@webkit.org>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>
Return the correct system font on OS X Mavericks.

Also prints a warning if other private system fonts are encountered.

Task-number: QTBUG-32789
Change-Id: I04e1471d25119caddb587972561e98defb1ffda1
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Make libtiff link on OS X 10.9.

Backport of Ie6f8639fb920e57289c7d0ad8952603abcfe7377.

Change-Id: I9d0cd625734fda88a9564d4fef7b1f5e9f22c774
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>