Merge pull request android-cn#5 from and0202/patch-2

Add calendar-card analysis

Author: Trinea

README.md

@@ -40,3 +40,4 @@ Android 优秀开源项目实现原理解析
 [Volley](https://android.googlesource.com/platform/frameworks/volley) | [geolo123](https://github.com/geolo123)
 [Otto](https://github.com/square/otto) | []()  
 [Async Http](https://github.com/loopj/android-async-http) | [81813780](https://github.com/81813780)
+[android-calendar-card](https://github.com/kenumir/android-calendar-card) | [and0202](https://github.com/and0202)