1. add validation for directory and filename
2. refactor the file operations about path
3. add in CMakeLists
4. add logger in nn_ops

The basic idea is: exploits data dependency to control the execution order
of side-effect operations, and keep the semantics of ANF unchanged.

The ControlDepend primitive is removed and there are two primitives added:

1. UpdateState:
```
  a = Assign(para, value)
```
became:
```
  a = Assign(para, value, u)
  u = UpdateState(u, a)
```

2. Load:
```
  x = Add(para, value)
```
became:
```
  p = Load(para, u)
  x = Add(p, value)
  u = UpdateState(u, p)
```

From: @xsmq
Reviewed-by: @c_34,@lilongfei15
Signed-off-by: @lilongfei15

From: @gzhcv
Reviewed-by: 
Signed-off-by:

From: @ms_yan
Reviewed-by: @lilongfei15
Signed-off-by:

From: @zhoufeng54
Reviewed-by: @lilongfei15,@xsmq
Signed-off-by: @xsmq

From: @jjfeing
Reviewed-by: 
Signed-off-by:

From: @limingqi107
Reviewed-by: @kisnwang,@cristoval
Signed-off-by: @cristoval

From: @zyli2020
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

From: @zhupuxu
Reviewed-by: 
Signed-off-by:

Signed-off-by: zhupuxu <zhupuxu@huawei.com>

add hostpush part modify

optimize previous code

provide aclhandle access method

modify CMakeList format

add device_id parameter into TransferNode

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

From: @liubuyu
Reviewed-by: 
Signed-off-by:

From: @yanghaitao1
Reviewed-by: @ouwenchang,@yelihua
Signed-off-by: @yelihua

From: @liu_xiao_93
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @liangchenghui

From: @liangzhibo
Reviewed-by: 
Signed-off-by:

From: @louie5
Reviewed-by: @ouwenchang
Signed-off-by:

From: @HulkTang
Reviewed-by: 
Signed-off-by:

From: @luopengting
Reviewed-by: 
Signed-off-by:

1. add string recorder
2. record somas
3. remove SomasInfoRecorder
4. fix clang and cpplint

From: @wilfchen
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

From: @gzhcv
Reviewed-by: @ouwenchang,@lilongfei15
Signed-off-by: @lilongfei15

From: @david-he91
Reviewed-by: 
Signed-off-by:

From: @yanghaitao1
Reviewed-by: @wangyue01,@lilongfei15
Signed-off-by: @lilongfei15

From: @fangzehua
Reviewed-by: 
Signed-off-by: