Add ReadImageToDatumReference to test_io
Added more tests to test_io for CVMatToDatum
Added mean_value to specify mean channel substraction
Added example of use to models/bvlc_reference_caffenet/train_val_mean_value.prototxt
Fix OSX compilation for nvcc with opencv
Fix calls to Rand() and test_data_layer error

Remove benchmarking code, fixed data_transformer doxygen docs
Fixed crop error and add test_data_transformer

Make lint happy

Fix Name conventions