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
Merge pull request #1138 from ksimonyan/vgg_models_support

VGG models support
Removed unnecessary "mutable"
Random crop bugfix and abstracting random number generation inside data_transformer
Merge pull request #1157 from ducha-aiki/fix-extract-features

Small fix in extract_features
Merge pull request #1149 from ashafaei/crop_bugfix

Fixed the bug with random offset selection
Merge remote-tracking branch 'upstream/dev' into test