Back-merge documentation and fixes

Back-merge documentation and fixes

format installation docs, add links
Add hdf5 requirements to 10.9 notes, drop cmake (not linked)
fix im2col height/width bound check bug (issue #284 identified by @kmatzen)
strip confusing confusing comment about shuffling files
add /etc/rc.local hint for boot configuration of gpus
Include k40 images per day benchmark
drop caffe presentation in favor of dropbox link
make build_docs.sh script work from anywhere
proofread, fix dead link, standardize NVIDIA capitalization
Added Link in index.md to perfomance_hardware.md
Added Performance and Hardware Tips
imagenet fix: ilvsrc -> ilsvrc