Add hmr head for human mesh estimation task.

[zengwang430521]

No description provided.

[codecov]

Codecov Report

Merging #162 into master will increase coverage by 0.80%.
The diff coverage is 93.06%.

@@            Coverage Diff             @@
##           master     #162      +/-   ##
==========================================
+ Coverage   82.03%   82.83%   +0.80%     
==========================================
  Files          88       95       +7     
  Lines        5160     5564     +404     
  Branches      886      929      +43     
==========================================
+ Hits         4233     4609     +376     
- Misses        768      784      +16     
- Partials      159      171      +12     

Flag	Coverage Δ
#unittests	82.83% <93.06%> (+0.80%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmpose/apis/inference.py	71.22% <50.00%> (-0.31%)	⬇️
mmpose/models/mesh_heads/discriminator.py	83.47% <83.47%> (ø)
mmpose/datasets/pipelines/mesh_transform.py	95.45% <95.45%> (ø)
mmpose/core/__init__.py	100.00% <100.00%> (ø)
mmpose/core/optimizer/__init__.py	100.00% <100.00%> (ø)
mmpose/core/optimizer/builder.py	100.00% <100.00%> (ø)
mmpose/datasets/pipelines/__init__.py	100.00% <100.00%> (ø)
mmpose/models/__init__.py	100.00% <100.00%> (ø)
mmpose/models/mesh_heads/__init__.py	100.00% <100.00%> (ø)
mmpose/models/mesh_heads/geometric_layers.py	100.00% <100.00%> (ø)
... and 8 more

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[innerlee]

looks good

[innerlee]

need a following pr to update readme & changelog