[OpenImageIO/f16] (16 commits) ...Merge with master.

[Richard Shaw]

Summary of changes:

  fdddaa9... Update to latest upstream release. (*)
  48e0521... Add patch for tbb includes. (*)
  464b352... Add patch for tbb includes. (*)
  e801c1b... Include tbb_machine.h for necessary function. (*)
  03f891c... Do not build against TBB for i686 because it fails. (*)
  edf03ed... Update to latest upstream release. (*)
  a1bd266... Update to latest upstream release. (*)
  20cc938... Fix date in changelog. (*)
  429a8f1... Add cmake to BR. (*)
  e4810c4... Use qt4-devel instead of qt-devel. (*)
  48e2b68... Update to latest upstream release. (*)
  b8cbdd9... Rebuild for updated libtiff. (*)
  6933418... Update to latest upstream release. (*)
  011445b... Add ppc patch. (*)
  f84394c... Update ppc patch and disable threads since ppc lacks real a (*)
  e985bed... Merge with master.

(*) This commit already existed in another branch; no separate mail sent