From: @shenghong96
Reviewed-by: @ouwenchang,@wenkai_dist
Signed-off-by: @wenkai_dist

From: @ngtony
Reviewed-by: 
Signed-off-by:

bugfix and add pillow to requirements.txt

modify summary format

bugfix

use sample_id in summary

fix CI problem

url encode '/' as well

fix ut

fix ut

fix ut

fix uncertainty enable checking

fix review comment

enhance exception raising

enhance comment

add this api to help ui asking user whether to set recommended watch points.

From: @shenghong96
Reviewed-by: @ouwenchang,@wenkai_dist
Signed-off-by: @wenkai_dist

Merge pull request !842 from TonyNG/bugfix/image_error_code

Merge pull request !816 from TonyNG/master

Merge pull request !831 from 张毅辉/zyh_profiler_restful

fix UT

del unused arguments

fix UT

explainer_api UT change to pytest style

fix UT url

explainer encapsulator UT change to pytest style

remove unnecessary deepcopy

remove import copy

fix some coding style issues

Merge pull request !795 from TonyNG/master

1. add cli entry
2. add more validation for hyper config
3. add validator for config dict
4. add st for optimizer config validator
5. add custom lineage for hyper config

json return null if ExplainManager returns None

use fromtimestamp

use fromtimestamp

wrong name

wrong json key

use offset as page offset

enhance comments

rm mock_explainer_api.py

update copyright year 2020

remove unused import

Merge pull request !722 from luopengting/fix_lineage

1. clean redundant code in lineage parsing and querier

2. delete get_summary_lineage()

3. modify related st and ut to use data_manager

Merge pull request !638 from luopengting/optimizer_open

Merge pull request !608 from gzhcv/bugfix

Merge pull request !601 from LiHongzhang/fix_caching

1. add functions for calculating target buckets and params importances
2. add restful api for target buckets, importances and metadata

Merge pull request !525 from yuximiao/yuximiao_gpu_profiler

If the env or gunicorn has some error, there will not be any error in console
or error log file when we set the subprocss stdout to devnull.
So I set it to None it will inhert its parent process stdout.
When gunicorn cause error, it will show error in console.