Merge pull request !3671 from ms_yan/vgg_optimize

add mindspore.hub and change model_zoo

Merge pull request !3657 from yangzhenzhang/add-stridedslice-op

Merge pull request !3405 from gziyan/fix_optimizer_parallel

fix line lengths

fix spacing

reverse a few changes

Merge pull request !3603 from jiangzhiwen/fix_column_names_exceeded

Merge pull request !3394 from XunDeng/pp_poc_v3

Merge pull request !3472 from Xiaoda/13-add-gpu-costmodel

Merge pull request !3528 from Simson/push-to-opensource

Merge pull request !3435 from yangzhenzhang/add-tile-op

added cdf, logcdf, survival, logsurvival, entropy, mode, cross_entropy wrapper

merge the script

optimize the script

Merge pull request !3519 from anzhengqi/remove-log

Merge pull request !3500 from lirongzhen1/master

Merge pull request !3525 from hewei/fix_parameter_bug

1. Parameter's init_data() should have no effect if default_input already set;
2. This bug is introduced by 'decouple ParamValue from python';
3. An unit test case is added to ensure the right init_data() behavior.

Merge pull request !3425 from fangzehua/avgpool

Merge pull request !3324 from fangzehua/reduce_any

Merge pull request !2983 from h.farahat/tensor_class

Merge pull request !3440 from xulei/sentence_piece0715

- cleanup work on createTensor and Tensor's constructors

Merge pull request !3183 from tony_liu2/master

Merge pull request !3404 from riemann_penn/add_sparse_api_docs

Merge pull request !3161 from flywind/output

Merge pull request !3371 from zhangbuxue/support_call_super_when_class_define_in_test_case