change buildtools for travis

Author: Tneciv

.travis.yml

@@ -3,8 +3,8 @@ android:
   components:
     # Uncomment the lines below if you want to
     # use the latest revision of Android SDK Tools
-    # - platform-tools
-    # - tools
+    - platform-tools
+    - tools
 
     # The BuildTools version used by your project
     - build-tools-23.0.1

README.md

@@ -1,4 +1,5 @@
-##「壁上观」是一个Material Design知乎日报阅读app [![Build Status](https://travis-ci.org/Tneciv/ZhihuDaily.svg?branch=master)](https://travis-ci.org/Tneciv/ZhihuDaily)
+##「壁上观」是一个Material Design知乎日报阅读app 
+  [![Build Status](https://travis-ci.org/Tneciv/ZhihuDaily.svg?branch=master)](https://travis-ci.org/Tneciv/ZhihuDaily)
 ### [Google play](https://play.google.com/store/apps/details?id=com.tneciv.zhihudaily "Google play")
 
 ### 历史版本：