GitLab

Changes include
- THC headers removal
- TH macros replacement
- fix some typo in comment
 Conflicts:
	apex/contrib/csrc/multihead_attn/additive_masked_softmax_dropout_cuda.cu
	apex/contrib/csrc/multihead_attn/encdec_multihead_attn_cuda.cu
	apex/contrib/csrc/multihead_attn/encdec_multihead_attn_norm_add_cuda.cu
	apex/contrib/csrc/multihead_attn/masked_softmax_dropout_cuda.cu
	apex/contrib/csrc/multihead_attn/self_multihead_attn_bias_additive_mask_cuda.cu
	apex/contrib/csrc/multihead_attn/self_multihead_attn_bias_cuda.cu
	apex/contrib/csrc/multihead_attn/self_multihead_attn_cuda.cu
	apex/contrib/csrc/multihead_attn/self_multihead_attn_norm_add_cuda.cu
	apex/contrib/csrc/multihead_attn/strided_batched_gemm.h