Kotlin setup for Android Studio project

app-build.gradle

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 25
    buildToolsVersion '25.0.2'

    defaultConfig {
        applicationId 'hellokotlin'
        minSdkVersion 16
        targetSdkVersion 25
        versionCode 1
        versionName '1.0'
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:25.2.0'
    compile 'com.android.support:support-annotations:25.2.0'
    compile 'com.android.support:support-v13:25.2.0'
    compile 'com.android.support:design:25.2.0'

    compile 'org.jetbrains.kotlin:kotlin-stdlib:1.1.0-rc-91'
    compile 'org.jetbrains.kotlin:kotlin-reflect:1.1.0-rc-91'

    testCompile 'junit:junit:4.12'
    testCompile 'org.jetbrains.kotlin:kotlin-test:1.1.0-rc-91'
    testCompile 'org.jetbrains.kotlin:kotlin-test-junit:1.1.0-rc-91'
}

root-build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        maven {
            url 'http://dl.bintray.com/kotlin/kotlin-eap-1.1'
        }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0-rc1'
        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0-rc-91'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        maven {
            url 'http://dl.bintray.com/kotlin/kotlin-eap-1.1'
        }
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}