Merge pull request !1236 from xulei/cppjieba0518

Merge pull request !1239 from huanghui/optimize-backend-anf-ir-proto-dump

Merge pull request !1278 from Etone.Chan/NBF

Merge pull request !1225 from chenweifeng/NoOp

Merge pull request !1210 from chenweifeng/cudnn_exception

Merge pull request !1205 from chenweifeng/unsorted_segment_sum

Merge pull request !1258 from jiangjinsheng/issue_lstm_dropout

Merge pull request !1286 from Kang/master

Merge pull request !1279 from gongchen/fix_custom_op_case

Merge pull request !1263 from Kang/master

Merge pull request !1270 from fary86/change_logging_level

Merge pull request !1125 from jiangjinsheng/space_to_depth

Merge pull request !1269 from wenchunjiang/fix_task_sink_bug

Merge pull request !1220 from SanjayChan/per

Merge pull request !1058 from sunsuodong/lstm_ops

Merge pull request !1262 from wanghua/master

Merge pull request !1189 from leopz/master

format code

remove save_graph

raise exception when dictionary setitem if the key not exists

resolve error

remove unnessary op_

Merge pull request !1274 from JesseKLee/NoWatchDogOnWindows

Merge pull request !1240 from jjfeing/master

Merge pull request !1267 from JoyLvliang/pynative-fix-precision-problem-for-depthwiseconv2dnative

Merge pull request !1169 from Tinazhang/random-crop

Merge pull request !1268 from kisnwang/fix-default-allreduce-group

Merge pull request !1264 from ms_yan/tf_column

Merge pull request !1111 from jiangjinsheng/vm_pack

Merge pull request !1256 from gengdongjie/master