add transform accuracy layer
add compact data layer (support for leveldb only)
add tools/convert_imageset_compact.cpp to convert images into JPEG compressed leveldb
Merge branch 'googlenet' of http://github.com/zhirongw/caffe into googlenet
compact_data_layer now supports LMDB; add codes tools/convert_imageset_compact.cpp to write JPEG images into LMDB
compact_data_layer now supports 9 scale/ratio combination
Merge remote-tracking branch 'qs/googlenet' into googlenet

Conflicts:
	src/caffe/proto/caffe.proto