Add tips for maintainers.

contributing.md

@@ -0,0 +1,40 @@
+# About AndroidSwipeLayout
+
+
+## How to contribute?
+
+### Type 1.
+
+1.  Fork this project.
+2.  Fix bug or add new features.
+3.  Send a pull request.
+
+PS. for maintainers, though every maintainer has authority to push directly to master branch, while, never do this. Create a branch and then open a PR will be the best practice.
+
+### Type 2.
+
+Improve and perfect the [WIKI](https://github.com/daimajia/AndroidSwipeLayout/wiki).
+
+
+## Contributors
+
+* **[jpshelley](https://github.com/jpshelley)**
+
+* **[daimajia](https://github.com/daimajia)**
+
+	 *My keywords.*
+
+    *   [Game of Throne](http://en.wikipedia.org/wiki/Game_of_Thrones)
+    *   [Nintendo](http://en.wikipedia.org/wiki/Nintendo)
+    *   [Nexus](http://en.wikipedia.org/wiki/Google_Nexus)
+    *   Like to share.
+
+* **[linfaxin](https://github.com/linfaxin)**
+
+* **[HarshEvilGeek](https://github.com/HarshEvilGeek)**
+
+
+
+***Notice: If you have contributed anything on this project, feel free to add your name (order is not important, contributors are equal), and fill the area belongs to you, You can add anything below your name.(for example:  your keywords, your favorite things, your most like foods, your dream, anything.)***
+
+