Merge pull request !2375 from h.farahat/python_tokenizer

- It provides a unified style to express graph and kernel for user.
- It provides a unified IR to represent graph and kernel for developer.
- It breaks the boundary between graph and kernel.
- It provides more opportunities to do compile optimization.

Merge pull request !2397 from zhaoting/ResNet50_st

Merge pull request !2380 from xiefangqi/xfq_fix_coco_issue_01

Merge pull request !2384 from YuJianfeng/split

Merge pull request !2378 from flywind/fix_yolov3_bug

Merge pull request !2056 from zhoufeng/enable-new-control-sink

Merge pull request !2157 from hangq/master

Merge pull request !2388 from VectorSL/bert-eval

Merge pull request !2143 from ms_yan/del_storage_c++

Merge pull request !2060 from amongo/SupportPynativeSetItem

Merge pull request !2338 from chenweifeng/nezha

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

init remove storage op test case c++

remove source c++ files

support for tensor setitem

add support for tensor assgin

Merge pull request !2347 from riemann_penn/support_multi_param_for_tuple_grad

Merge pull request !2379 from zyli2020/change_ftrl_op_st

Merge pull request !2363 from yanghaitao/yht_fix_textfiledataset

Merge pull request !2259 from pkuliuliu/master

Merge pull request !2372 from h.farahat/cleanup_0619

Merge pull request !2337 from chenzhongming/master

Merge pull request !2147 from ougongchang/master

!38 Synchronize with latest Ascend software suite 17 Jun 2020
Merge pull request !38 from yanghaoran/master

Merge pull request !2373 from danishnxt/AugOpsD1

Merge pull request !2325 from imaaamin/object_ops_pr2

updated comments for 3 BB AugOps

addressing comments, void -> status, macros added, fixed test cmt

changed types -> value, fixed ut test funcs, grammar

bug type fix

fixed condition in tests for viz

I added a SummaryCollector to help users automatically collect information
such as the network, loss, learning rate and so on, making it easier to collect this information.

It also can collect train lineage and eval lineage information which is
collected by TrainLineage Callback and EvalLineage Callback in
MindInsight.

I also add some UT for SummaryCollect to keep the code correct.

Merge pull request !1897 from jinyaohui/print