mean-variance normalization layer
reduced blas calls
lint
addressed Jeff's comment
Merge pull request #904 from Yangqing/sweep

Add a leveldb option function in io.hpp/cpp
added cross-channel MVN, Mean-only normalization, added to layer factory, moved to common_layers
minor fix for layer factory
lint
[docs] sorting of examples. if doesn’t work for you, update jekyll.
Merge pull request #909 from sergeyk/dev

[docs] sort examples
[docs] [fix] closes #899
[docs] ‘maximally accurate’ in the web demo explanation. closes #905
Merge pull request #910 from sergeyk/dev

web demo updates
[examples] fix links in feature extraction
lint targets should depend on the lint script itself
Add caffe/alt_fn rule to lint checks to check for functions (like memset
& memcpy) with caffe_* alternatives that should be used instead.
Create caffe_{,gpu_}memset functions to replace {m,cudaM}emset's.
Fix caffe/alt_fn lint errors.
Merge pull request #863 from jeffdonahue/lint-check-caffe-fns

add lint check for functions with Caffe alternatives (memcpy, memset)
Merge pull request #846 from qipeng/mvn-layer

mean-variance normalization layer