Updated build target to Android APIv23

sample_client/AndroidManifest.xml

@@ -30,7 +30,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-sdk
         android:minSdkVersion="8"
-        android:targetSdkVersion="19" />
+        android:targetSdkVersion="23" />
     <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
         <activity 	android:name="MainActivity"
                   	android:label="@string/app_name"

sample_client/build.gradle

@@ -9,8 +9,8 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 19
-    buildToolsVersion "22.0.1"
+    compileSdkVersion 23
+    buildToolsVersion "23.0.2"
 
     sourceSets {
         main {

sample_client/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-1.12-all.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-2.2.1-all.zip

sample_client/project.properties

@@ -11,5 +11,5 @@
 #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
 
 # Project target.
-target=android-19
+target=android-23
 android.library.reference.1=..