...even though testing is handled apart from the solver

This net is fine-tuned from VGG-16 all-at-once instead of in stages.
All-at-once learning is faster and less tedious but gives an
ever-so-slightly less accurate model.

pull modules out of Caffe for portability

master edition of `Crop` requires parameters (as defined by coord_map)
in net spec

The SBD train and VOC 2011 segval splits intersect, so the paper reports
validation scores for the non-intersecting part of SBD train and
seg11val which we call "seg11valid"

include preliminary version of reference PASCAL models for PAMI edition