Update NNI on Windows doc (#1117)

* Remove version

* Update

* Update

* Fix comments

* Update

* Rollback installation

* Add link to installation

README.md

@@ -155,7 +155,7 @@ Windows
 ```bash
   git clone -b v0.7 https://github.com/Microsoft/nni.git
   cd nni
-  powershell ./install.ps1
+  powershell .\install.ps1
 ```
 
 For the system requirements of NNI, please refer to [Install NNI](docs/en_US/Installation.md)
@@ -185,7 +185,7 @@ Windows
 * Run the MNIST example.
 
 ```bash
-    nnictl create --config nni/examples/trials/mnist/config_windows.yml
+    nnictl create --config nni\examples\trials\mnist\config_windows.yml
 ```
 
 * Wait for the message `INFO: Successfully started experiment!` in the command line. This message indicates that your experiment has been successfully started. You can explore the experiment using the `Web UI url`.

docs/en_US/Installation.md

@@ -15,7 +15,7 @@ Currently we support installation on Linux, Mac and Windows(local, remote and pa
 
   Prerequisite: `python >=3.5`, `git`, `wget`
   ```bash
-  git clone -b v0.7 https://github.com/Microsoft/nni.git
+  git clone -b v0.8 https://github.com/Microsoft/nni.git
   cd nni
   ./install.sh
   ```
@@ -48,9 +48,9 @@ Currently we support installation on Linux, Mac and Windows(local, remote and pa
   you can install NNI as administrator or current user as follows:
 
   ```bash
-  git clone -b v0.7 https://github.com/Microsoft/nni.git
+  git clone -b v0.8 https://github.com/Microsoft/nni.git
   cd nni
-  powershell ./install.ps1
+  powershell .\install.ps1
   ```
 
 ## **System requirements**

docs/en_US/NniOnWindows.md

@@ -4,31 +4,7 @@ Currently we support local, remote and pai mode on Windows. Windows 10.1809 is w
 
 ## **Installation on Windows**
 
-  **Anaconda or Miniconda python(64-bit) is highly recommended.**  
-
-When you use PowerShell to run script for the first time, you need **run PowerShell as administrator** with this command:
-
-```bash
-Set-ExecutionPolicy -ExecutionPolicy Unrestricted
-```
-
-* __Install NNI through pip__
-
-  Prerequisite: `python(64-bit) >= 3.5`
-
-  ```bash
-  python -m pip install --upgrade nni
-  ```
-
-* __Install NNI through source code__
-
-  Prerequisite: `python >=3.5`, `git`, `PowerShell`
-
-  ```bash
-  git clone -b v0.8 https://github.com/Microsoft/nni.git
-  cd nni
-  powershell -file install.ps1
-  ```
+  please refer to [Installation](Installation.md#installation-on-windows) for more details.
 
 When these things are done, use the **config_windows.yml** configuration to start an experiment for validation.
 

docs/en_US/QuickStart.md

@@ -154,7 +154,7 @@ Run the **config_windows.yml** file from your command line to start MNIST experi
 **Note**, if you're using NNI on Windows, it needs to change `python3` to `python` in the config.yml file, or use the config_windows.yml file to start the experiment.
 
 ```bash
-    nnictl create --config nni/examples/trials/mnist/config_windows.yml
+    nnictl create --config nni\examples\trials\mnist\config_windows.yml
 ```
 
 Note, **nnictl** is a command line tool, which can be used to control experiments, such as start/stop/resume an experiment, start/stop NNIBoard, etc. Click [here](Nnictl.md) for more usage of `nnictl`