[docs] replace intro slides with caffe tutorial
Merge pull request #1052 from shelhamer/caffe-presentation

Caffe tutorial slides
Back-merge to dev for slides
Implemented elementwise max layer
lint & reduce gradient check stepsize to pass checks
Merge pull request #1053 from jeffdonahue/to3i-elem_max_layer

rebase and fixup #688 from @to3i: elementwise max
Fix lmbdb travis with openldap
Merge pull request #1067 from bhack/lmdb

Get lmdb from openldap
restore "red X" build failures in Travis
try to fix travis cmake build by commenting out parallel make