fix im2col height/width bound check bug (issue #284 identified by
@kmatzen)
Add hdf5 requirements to 10.9 notes, drop cmake (not linked)
format installation docs, add links
Drop Lena image in favor of a cute cat photo

Social progress.
rename doc deploy script for better tab completion
re-time imagenet example on k20, instead of my laptop
polished ignore
define AlexNet architecture

Swap order of lrn and max pooling layers to reflect Krizhevsky
architecture. Initialize biases to 0.1 where Krizhevsky had 1, as
training by initialization with 1 has flat loss.
Document AlexNet model, include download script
include pretrained snapshot and performance details