Pillow fixes

There are two things I'm unsure about:

  1. The ``jpeg`` run requirement is unix only in the ``pillow`` yaml. Should it be unix only in the ``libtiff``?
  2. Does the ``pillow`` build number need bumping?

To summarise the fixes:

  1. Typo in ``libtiff`` name
  2. ``jpeg`` should be a run/build requirement for ``libtiff`` to prevent it from linking against the system ``jpeg``
  3. Latest ``pillow`` seems to have a multiprocess build system which doesn't seem to work on Windows, and doesn't really seem necessary anyway.
You don't need to bump this, since any prior builds would be the wrong package name anyway.