Install Pillow 3.1.0.dev0
Install Pillow 3.1.0.dev0

Pillow > 3.0.0 has improved its support for dealing with TIFFs, but
their latest official release is 3.0.0. This uses a Git SHA of their
current `master` (as of today) to install version 3.1.0.dev0.

aaronxsu/raster-foundry,raster-foundry/raster-foundry,kdeloach/raster-foundry,kdeloach/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,kdeloach/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,aaronxsu/raster-foundry,raster-foundry/raster-foundry