Update gradle-plugin and build-tools

build.gradle

@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.2.3'
+        classpath 'com.android.tools.build:gradle:1.3.1'
         classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.+'
     }
 }
@@ -17,6 +17,6 @@ allprojects {
 }
 
 ext {
-    buildToolsVersion = "22.0.1"
+    buildToolsVersion = "23.0.0"
     compileSdkVersion = 22
 }