Simplify node traversal strategy.

Add a case when the node is a parameter.

format

Standardize operation.

Merge pull request !1087 from SanjayChan/03cell

Merge pull request !1088 from YuJianfeng/master

Merge pull request !1093 from yihuaijie/master

Merge pull request !683 from xychow/bypass-renorm-and-specialize-hypermap-parameter

Merge pull request !1062 from liuxiao/softplus-softplusgrad

Merge pull request !1085 from zhaozhenlong/vm-adapt-topk

Merge pull request !1050 from vlne-v1/I1GEPN-check-bprop-error-loss-scale-wrap

Merge pull request !1083 from SanjayChan/02bug_fix

Merge pull request !1081 from SanjayChan/formast

Merge pull request !997 from jiangjinsheng/log1p

Merge pull request !950 from yoonlee666/master

Merge pull request !1017 from jinyaohui/context_opt

Merge pull request !1077 from jjfeing/master

Merge pull request !1073 from yao_yf/reshape_bug_fix

Merge pull request !766 from gongchen/nest_loop

Merge pull request !1065 from ghzl/improve-parameter-groups

Merge pull request !1075 from cathwong/ckw_dataset_ut_cleanup3

Merge pull request !1055 from jiangjinsheng/vm_floor

Merge pull request !1060 from fary86/fix_assign_target_not_parameter

Merge pull request !1034 from SanjayChan/dropout

Merge pull request !1076 from JesseKLee/btree

Merge pull request !1044 from jinyaohui/clean_pylint_test

Merge pull request !1071 from guozhijian/update_modele_ge

Merge pull request !1054 from yangzhenzhang/add-slice-shape-for-param-info

Merge pull request !953 from fary86/add_submodule_id_for_log_interface

Merge pull request !1063 from guozhijian/revert-merge-713-master

Merge pull request !1057 from chenweifeng/matmul

Merge pull request !1046 from wandongdong/master

Merge pull request !1048 from panyifeng/index_to_switch_case