Updated docs

Signed-off-by: Vitaly Lavrukhin <[email protected]>

Merge pull request NVIDIA#269 from edwardhdlu/wavenet-pull-request

WaveNet Implementation

Updated docs

Updated docs

Update Readme

Merge pull request NVIDIA#170 from NVIDIA/dev0.4

dev0.4

Merge pull request NVIDIA#121 from NVIDIA/docs_rebuild2

Fix typo with use_horovod=True

Merge pull request NVIDIA#67 from NVIDIA/r0.2-18.05

R0.2 18.05