clean incorrect relu test code
relax benchmark milliseconds threshold
Merge pull request #1417 from Yangqing/dev

clean incorrect relu test code
fix relu cudnn test bug
Merge pull request #1432 from Yangqing/dev

fix relu cudnn test bug
merge
Some debugging info for when a label is not properly defined.
Fixed some CHECKs in protobuf layer.
Added the ability to shift by mean and scale by stdev to protobuf data layer labels.
Memory reclaim
More error handling for protobuf layer.
Added weights to protobuf data layer.
merge viz
Shrink images if they are really big.
Downsamples log records before sending them to the browser.
Fixed viz server so that layer names with hyphens are handled properly.
Added min and max to viz
Expose min and max in server.
Reduce number of datapoints.
Separate out record types before downsampling.