Fix typo in LRN-expression in docs

This is more consistent with krizhevsky2012, and it seems to be what the code does.
Merge pull request #1115 from rickardnorlander/master

Fix typo in LRN-expression in docs
include WindowDataLayer in data param upgrade
load transform params in window data layer
define up-to-date all-in-one model for pascal finetuning
Merge pull request #1126 from shelhamer/window-data-param-upgrade

[fix] include WindowDataLayer in data param upgrade
Back-merge

  define up-to-date all-in-one model for pascal finetuning
  load transform params in window data layer
  include WindowDataLayer in data param upgrade
  Fix typo in LRN-expression in docs
default backend to lmdb for image conversion and mean computation

lmdb is 10-15% faster than leveldb although it takes ~1.1x the storage.
This is usually irrelevant in prefetching since both are fast enough,
but more important lmdb allows multiple, concurrent reads for training
and evaluation several models on the same data.
fix cifar10 paths so they can be run from caffe root
switch examples to lmdb (except for custom data loaders)
Merge pull request #1128 from shelhamer/default-db-lmdb

default to lmdb for database storage
web demo fix, closes #1002
adds a parameter to the LRN layer (denoted as "k" in  [Krizhevsky et al., NIPS 2012])
added support for "k" LRN parameter to upgrade_proto
added matcaffe_demo for the VGG models (RGB input)
added comments to the Matlab demo script
added example usage to the Matlab script
RGB -> BGR in the matlab demo
added a Matlab demo with mean BGR pixel subtraction instead of the mean image subtraction
Fixed param order of cv::Size in cv::resize