Fix typo in LRN-expression in docs

This is more consistent with krizhevsky2012, and it seems to be what the code does.
fix directory in finetune pascal example
Merge pull request #1117 from ronghanghu/fix-finetune-example

[fix] set R-CNN fine-tuning PASCAL example paths
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
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
Merge pull request #2 from BVLC/master

Update from BVLC