update readme (#33)

Author: Xin Shi

README.md

@@ -1,41 +1,54 @@
 
 # Azure IoT EdgeHub Dev Tool [![Build Status](https://travis-ci.com/Azure/iotedgehubdev.svg?token=KySEv4A21JkyzbCKjpFW&branch=master)](https://travis-ci.com/Azure/iotedgehubdev)
-The Azure IoT EdgeHub Dev Tool provides a simulated EdgeHub environment for developing Edge moduls and solutions.
+The Azure IoT EdgeHub Dev Tool provide a local development experience with a simulated EdgeHub environment for creating, developing, testing, running, and debugging Azure IoT Edge modules and solutions.
 - The Edge solution could be run with the simulated EdgeHub locally without pushing image and creating deployment
 - It helps to debug the module on the host (not in container) with the EdgeHub
 
-## Quickstart
-### Prerequisite
-#### 1. **Install Docker**
-- Note: On Windows, please make sure the Docker is in **Linux mode**.
-#### 2. **Install Python (2.7/3.6)**
-#### 3. **Install iotedgehubdev**
-
+## Installing
+1. Install [Docker CE](https://www.docker.com/community-edition) on Windows, macOS or Linux.
+    > Note: On Windows, please make sure the Docker is in **Linux mode**.
+2. Install [Python (2.7/3.6) and Pip](https://www.python.org/)
+3. Install iotedgehubdev by running below command in your terminal
+    ```
     pip install --upgrade iotedgehubdev
+    ```
 
-### Run Tool
-#### Setup
-- `iotedgehubdev setup -c <edge-device-connection-string>`
-
-#### Run an IoT Edge Solution in Simulator
-- `iotedgehubdev start -d <path/to/deployment manifest>`
-- `iotedgehubdev stop`
-
-#### Run/Debug a single module natively
-- `iotedgehubdev start -i <module-inputs>`
-
-    For example:
-
-        `iotedgehubdev start -i "input1,input2"`
-
-- `iotedgehubdev modulecred`
-
-  It will output the module credential environment variables.
-
-- Start the module natively with the environment variables got from previous step
-- Send message to the module through restful api. 
-
-    For example:
-
+## Quickstart
+1. Setup
+    ```
+    iotedgehubdev setup -c <edge-device-connection-string>
+    ```
+
+2. Start/Stop an IoT Edge Solution in simulator
+    ```
+    iotedgehubdev start -d <path/to/deployment manifest>
+    iotedgehubdev stop
+    ```
+
+3. Start and debug a single module natively
+    1. Start the module with specific input(s)
+        ```
+        iotedgehubdev start -i <module-inputs>
+        ```
+
+        For example: `iotedgehubdev start -i "input1,input2"`
+    
+    2. output the module credential environment variables
+
+        ```
+        iotedgehubdev modulecred
+        ```
+
+    3. Start the module natively with the environment variables got from previous step
+    4. Send message to the module through restful api. 
+
+        For example:
         `curl --header "Content-Type: application/json" --request POST --data '{"inputName": "input1","data": "hello world"}' http://localhost:53000/api/v1/messages`
- 
+ 
+## Other resources
+- [Azure IoT Edge for Visual Studio Code](https://github.com/microsoft/vscode-azure-iot-edge)
+- [Azure IoT Edge Dev CLI Tool](https://github.com/azure/iotedgedev)
+
+## Data/Telemetry
+This project collects usage data and sends it to Microsoft to help improve our products and services. Read our [privacy statement](http://go.microsoft.com/fwlink/?LinkId=521839) to learn more. 
+If you don’t wish to send usage data to Microsoft, You can change your telemetry settings by updating `collect_telemetry` to `no`in the ini file.