Pillow now requires the olefile Python package through setup.py.
This removes Pillow's maintenance of this library by instead relying on
and reusing the upstream version. No longer need to regularly update the
vendored package and docs. olefile bug fixes and features can go
directly upstream.
During travis tests, now installs Pillow package before tests; this will
also install all dependencies (currently, only olefile).
In py3k, imports are absolute unless using the "from . import" syntax.
This commit also solves a recursive import between Image, ImageColor, and
ImagePalette by delay-importing ImagePalette in Image.
I'm not too keen on this commit because the syntax is ugly. I might go back
and prefer the prettier "from PIL import".
