Tag v0.3.2 works with PyTorch docker up to ROCm4.0, it includes sever…

…al critical bug fixes

Fix LayerNorm op on ROCm (ROCm#36)

* fix warp size in WARP_SHFL* in layernorm

* enable fused_layer_norm tests on ROCm

update readme with ninja build instruction and pip3.6 install (ROCm#35)

Merge pull request ROCm#18 from lcskrishna/cl/readme-updates

[Documentation] Update the readme for ROCm.

Enable support for sparse tensors for multi_tensor_apply (ROCm#6)