build.gradle: update to the latest gradle plugin version

android/build.gradle

@@ -3,11 +3,11 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.12.+'
+        classpath 'com.android.tools.build:gradle:0.13.2'
     }
 }
 
-apply plugin: 'android'
+apply plugin: 'com.android.application'
 
 repositories {
     mavenCentral()