Merge branch 'develop' of https://github.com/PaddlePaddle/Serving into develop

CONTRIBUTING.md

-ontribute Code
+Contribute Code
 
 You are welcome to contribute to project Paddle Serving.
 
@@ -17,8 +17,8 @@ Paddle Serving uses this [Git branching model](http://nvie.com/posts/a-successfu
    To make a copy of your fork to your local computers, please run
 
    ```bash
-   git clone https://github.com/your-github-account/serving
-   cd serving
+   git clone https://github.com/your-github-account/Serving
+   cd Serving
    ```
 
 1. Create the local feature branch
@@ -68,7 +68,7 @@ Paddle Serving uses this [Git branching model](http://nvie.com/posts/a-successfu
    An experienced Git user pulls from the official repo often -- daily or even hourly, so they notice conflicts with others work early, and it's easier to resolve smaller conflicts.
 
    ```bash
-   git remote add upstream https://github.com/PaddlePaddle/serving
+   git remote add upstream https://github.com/PaddlePaddle/Serving
    git pull upstream develop
    ```
 
@@ -80,7 +80,7 @@ Paddle Serving uses this [Git branching model](http://nvie.com/posts/a-successfu
    git push origin my-cool-stuff
    ```
 
-   The push allows you to create a pull request, requesting owners of this [official repo](https://github.com/PaddlePaddle/serving) to pull your change into the official one.
+   The push allows you to create a pull request, requesting owners of this [official repo](https://github.com/PaddlePaddle/Serving) to pull your change into the official one.
 
    To create a pull request, please follow [these steps](https://help.github.com/articles/creating-a-pull-request/).