Make Pillow a requirement

[Juan Nunez-Iglesias]

In a related note, we just found that Travis *installs FreeImage and Pillow
for ALL tests*!!! This is completely ludicrous given that these are not
requirements!!!


On Fri, Jul 11, 2014 at 10:32 AM, Juan Nunez-Iglesias <jni.soma at gmail.com>
wrote:

> @jjhelmus and I are having a discussion regarding IO and how tests fail if
> you don't have any of Pillow, PyQt, freeimage, etc, none of which are
> actually a requirement. As one of the sprint topics is fixing up IO, this
> would be a great thing to fix.
>
> Cheap solution: make Pillow a requirement.
>
> Expensive solution: write/pilfer our own  IO modules, however inefficient
> they may be. (e.g. tifffile.py for tifs, maybe similar PNG)
>
> I don't see any *other* solution. Making mpl a requirement is not useful
> since their IO is also broken (e.g. images convert to float by default).
>
> Juan.
>
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