merge from xiong's master, with support for accumulated diff
Merge remote-tracking branch 'upstream/master'
fixed bug: accumulate diffs
Merge branch 'master' into googlenet
merged with master and update the solver.prototxt
add label transform for softmax loss
Merge remote-tracking branch 'qs/transform_label_layer' into googlenet
add compact data layer (support for leveldb only)
add tools/convert_imageset_compact.cpp to convert images into JPEG compressed leveldb
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 sqiu  before
Merge remote-tracking branch 'sqiu/googlenet' into mpi_parallel
add MPI support for compact data layer