Merge pull request !281 from SanjayChan/origin/quant_liantiao

Merge pull request !283 from jjfeing/master

Merge pull request !273 from liyong126/mindrecord_subset_sampler_python

Merge pull request !269 from ZhangQinghua/master

Merge pull request !250 from casgj/gaojing_new4

Merge pull request !239 from fanglei/master

Merge pull request !270 from SanjayChan/mac_os

Merge pull request !207 from ZiruiWu/batch_info_overflow

Merge pull request !271 from pengyanjun/fix_repeat_epoch_doc

Merge pull request !200 from chengang/quant

Merge pull request !132 from huanghui/master

adjust internal api

Merge pull request !247 from JoyLvliang/fix-bug-type-str-is-invalied-uint16

Merge pull request !216 from YuJianfeng/master

Merge pull request !266 from ghzl/modify-some-example-in-me-front

Merge pull request !245 from chentingting/add_bool_type_check_in_comm_op

Merge pull request !258 from lichen/add_minimum_distributed_op

Merge pull request !208 from vlne-v1/I1D33P-auto-mix-precision-eval-support

Merge pull request !265 from vlne-v1/I1EE1P-insertgradiendof-with-parameter

Merge pull request !248 from zjun/fix_getnext_bug

Merge pull request !224 from zhangbuxue/dock_relu6_for_open_source_processes

Merge pull request !212 from SanjayChan/quant_frontend

Merge pull request !257 from ghzl/fix-print-content-of-mstype-string

Merge pull request !203 from kisnwang/optimize-allreduce-mem-malloc