update readme

Author: jyuesong

Diff for: build.gradle

@@ -6,7 +6,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:2.2.0'
-
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

Diff for: gradle/wrapper/gradle-wrapper.jar

@@ -0,0 +1,6 @@
+#Mon Dec 28 10:00:20 PST 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip

Diff for: gradle/wrapper/gradle-wrapper.properties

@@ -1,11 +1,12 @@
 apply plugin: 'com.android.library'
-
+apply plugin: 'com.github.dcendents.android-maven'
+group='com.github.jiang111'
 android {
     compileSdkVersion 24
     buildToolsVersion "24.0.2"
 
     defaultConfig {
-        minSdkVersion 18
+        minSdkVersion 11
         targetSdkVersion 24
         versionCode 1
         versionName "1.0"