Initial draft of the ADDING_A_PLUGIN.md document. (#250)
Initial draft of the ADDING_A_PLUGIN.md document. (#250)

* Initial draft of the ADDING_A_PLUGIN.md document.

This draft was collectively written by @dandelion, @wchargin, @chizeng, and @jart

* Changes in response to wchargin's comments.

* More tweaks as suggested in reivew.

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