Created by: qingqing01

Hapi is a high level API for training and inference. The main modules include Model, Loss, Metrics, Dataset. Also includes some common modules and models in NLP and computer vision, such as BERT, ResNet.

These modules are developed by: 0YuanZhang0, guoshengCS heavengate, LielinJiang, qingqing01, xyzhou-puck huangjun12, wangxiao1021 zhangyang

There are 3 PRs to merge: first is core framework, other two are vision and text module. This is the first PR.

tree dir is :

`-- hapi
    |-- __init__.py
    |-- callbacks.py
    |-- datasets
    |   |-- __init__.py
    |   |-- flowers.py
    |   |-- folder.py
    |   |-- mnist.py
    |   `-- utils.py
    |-- distributed.py
    |-- download.py
    |-- logger.py
    |-- loss.py
    |-- metrics.py
    |-- model.py
    |-- progressbar.py
    |-- tests
    |-- tests
    |   |-- CMakeLists.txt
    |   |-- test_model.py
    |   |-- ...
    |-- utils.py
    `-- vision
        |-- __init__.py
        `-- models
            |-- __init__.py
            `-- lenet.py