add Tweetin

Author: Joker

README.md

@@ -84,6 +84,7 @@ App Name                   | Describe                  | Major Language
 [weiciyuan](https://github.com/qii/weiciyuan) | Sina Weibo Android Client | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.qii.weiciyuan)   
 [RedPhone](https://github.com/WhisperSystems/RedPhone) | A secure calling app for Android. | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.thoughtcrime.redphone) 
 [TextSecure](https://github.com/WhisperSystems/TextSecure/) | A secure calling app for Android. | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms) 
+[Tweetin](https://github.com/mthli/Tweetin) | Yet another Twitter unofficial client for Lollipop. | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=io.github.mthli.Tweetin)   
 [Twidere-Android](https://github.com/TwidereProject/Twidere-Android/) | Twitter client for Android | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.mariotaku.twidere)   
 [v2ex-daily-android](https://github.com/kyze8439690/v2ex-daily-android) | A v2ex client on android platform. | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.yugy.v2ex.daily) 
 [WordPress](https://github.com/wordpress-mobile/WordPress-Android) | WordPress for Android http://android.wordpress.org | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.wordpress.android)