From: @lixiachen
Reviewed-by: @mikef,@nsyca
Signed-off-by: @nsyca

and other minor changes per the request of HQ testers

add 2 test cases to IRNode Deepcopy()

address review cmts

fix ut

samplerObj copy

ci

fix ci

fix ci round III

address further review cmts

add a missing macro

fix merge conflict

fix complie err

fix lite compile err

fix compile err

fix lite compile round III

address an issue

fix minor comments

Added linter fix for album dataset

Added testDataset

Adding signature

Added JsonDataset example API

Example dataset

Resolving format

More fixing

Refactor

Small fix

Added compiling album dataset

Running tests

Added linter fix #1

Passing UT

Added dataset API

Addressing clang

Clang part 2

Fixing pass

Fixed tree check

lint fix

Added lint fix part 2

Merge pull request !3212 from anzhengqi/epochs-ready