Failed to resolve: com.afollestad:material-dialogs:0.6.0
<p>I imported a new app and I get the following error from Gradle (Android Studio): </p>

<pre><code>Failed to resolve: com.afollestad:material-dialogs:0.6.0
</code></pre>

<p>Here's my gradle file:</p>

<pre><code>apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.pongodev.recipesapp"
        minSdkVersion 11
        targetSdkVersion 21
        versionCode 5
        versionName "3.0.3"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])

    // Main libraries, you always need this libraries in your project. do not remove them.
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.android.support:support-v4:21.0.3'
    compile 'com.google.android.gms:play-services:6.5.87'

    // Important library to create material design. do not remove this.
    compile project(':materialDesign')

    // Library to create tabbar
    compile 'com.jpardogo.materialtabstrip:library:1.0.6'

    // Library to create ripple effect. work together with materialDesign library.
    compile 'com.github.traex.rippleeffect:library:1.2.2'

    // Library to create rounded, circle, and any shape image.
    compile 'com.makeramen:roundedimageview:1.4.0'

    // Library load lazy images.
    compile 'com.squareup.picasso:picasso:2.4.0'

    // Library to create simple list.
    compile 'com.android.support:recyclerview-v7:21.0.0'

    // Library to create complex clickable list.
    compile 'com.android.support:cardview-v7:21.0.3'

    // Library to create material dialog.
    compile 'com.afollestad:material-dialogs:0.6.0'

    // Library to create animation imageview.
    compile 'com.flaviofaria:kenburnsview:1.0.5'

}
</code></pre>

<p>How can I fix this? </p>