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

If the ENABLE_DUMP_IR is off, the program will raise ValueError to
remind user to turn on ENABLE_DUMP_IR.

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: @luopengting
Reviewed-by: @ouwenchang,@lixiaohui33
Signed-off-by: @lixiaohui33

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

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

1. add env_config_path for ms_context
2. add EnvConfigParser to parse config
3. add in CMakeLists
4. clang-format, cpplint
5. fix spelling in ms_context

Use EnvConfigParser in the constructed function of base_recorder,
when a recorder is initialized, its direcctory will be set as the
value from config file. In addition, recorder_manager will get the
'enable' from config file. If 'enable' is true and the path is not a
valid value, it will be the default value: './rdr'.

From: @ginfung
Reviewed-by: @zh_qh
Signed-off-by: @zh_qh

From: @adelshafiei
Reviewed-by: @john_tzanakakis,@wangyue01
Signed-off-by: @wangyue01

From: @adelshafiei
Reviewed-by: @john_tzanakakis,@nsyca
Signed-off-by: @john_tzanakakis

don't load tensors if the type is none

From: @liangzhibo
Reviewed-by: @zhunaipan,@zh_qh
Signed-off-by: @zh_qh

From: @bairongz
Reviewed-by: @zhunaipan,@zh_qh
Signed-off-by: @zh_qh

From: @jiang-shuqiang
Reviewed-by: 
Signed-off-by:

add true/false/0 for ENABLE_MS_DEBUGGER

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

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

From: @adelshafiei
Reviewed-by: @john_tzanakakis,@wangyue01
Signed-off-by: @wangyue01

From: @harsh1995
Reviewed-by: @john_tzanakakis,@wangyue01
Signed-off-by: @wangyue01

From: @harsh1995
Reviewed-by: @wangyue01,@wenkai_dist
Signed-off-by: @wenkai_dist

From: @zh_qh
Reviewed-by: @stsuteng,@kingxian
Signed-off-by: @stsuteng

ex.) $(fg_xxx.xx:[CNode]xx)

From: @john_tzanakakis
Reviewed-by: @mikef,@nsyca,@robingrosman
Signed-off-by:

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