I think the additional install was something we had to do to get my python environment setup right. Sorry for the mix up.

Development-Environment-Setup.md

@@ -17,7 +17,6 @@ You will need to open a new bash shell now.
 Install python packages using pip and conda:
 * pip install pvl coverage pysal
 * pip install protobuf==3.0.0b2
-* pip install dill
 * conda install gdal
 * conda install -c osgeo proj4 dill
 * conda install -c https://conda.anaconda.org/jlaura opencv3=3.0.0