Merging rc0 back into master.
Merging rc0 back into master.

agrubb/tensorboard,francoisluus/tensorboard-supervise,ioeric/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,shakedel/tensorboard,francoisluus/tensorboard-supervise,shakedel/tensorboard,francoisluus/tensorboard-supervise,agrubb/tensorboard,agrubb/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,ioeric/tensorboard,ioeric/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,shakedel/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,ioeric/tensorboard,tensorflow/tensorboard,agrubb/tensorboard,agrubb/tensorboard,agrubb/tensorboard,qiuminxu/tensorboard,ioeric/tensorboard,ioeric/tensorboard,shakedel/tensorboard,shakedel/tensorboard,qiuminxu/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,shakedel/tensorboard,qiuminxu/tensorboard