I have added the gradle files. Please review them and help me fix the problem. I am having a problem in gradle sync as I copied this project from github I followed every single step. Thanks
    // Top-level build file where you can add configuration options common      to all sub-projects/modules.enter code here
    buildscript {
        repositories {
            jcenter()
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:2.2.3'
            // NOTE: Do not place your application dependencies here; they  belong
            // in the individual module build.gradle files
        }
    }
    allprojects {
        repositories {
            jcenter()
        }
    }
    task clean(type: Delete) {
        delete rootProject.buildDir
    }
    task copy_cardboard_images() {
        doFirst {
            exec {
                if (System.properties['os.name'].toLowerCase().contains('windows')) {
                    // windows
                    commandLine 'cmd', '/c', 'adb', 'pull', '/mnt/shell/emulated/0/DCIM/CardboardCamera'
                } else {
                    // linux
                    commandLine 'adb', 'pull', '/mnt/shell/emulated/0/DCIM/CardboardCamera'
                }
            }
        }
        doLast {
            copy {
                from 'CardboardCamera'
                into 'website/images'
            }
        }
    }
    task remove_cardboard_images() {
        doFirst {
            exec {
                if (System.properties['os.name'].toLowerCase().contains('windows')) {
                    // windows
                    commandLine 'cmd', '/c', 'adb', 'shell', 'rm',  '-r', '/mnt/shell/emulated/0/DCIM/CardboardCamera'
                } else {
                    // linux
                    commandLine 'adb', 'shell', 'rm',  '-r', '/mnt/shell/emulated/0/DCIM/CardboardCamera'
                }
            }
        }
    }
    task move_cardboard_images() {
        dependsOn copy_cardboard_images
        dependsOn remove_cardboard_images
    }
Build.gradle : app module 
apply plugin: 'com.android.application'
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    defaultConfig {
        applicationId "com.google.devrel.vrviewapp"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.android.support:design:23.3.0'
    compile project(':gvr-android-sdk/libraries:common')
    compile project(':gvr-android-sdk/libraries:commonwidget')
    compile project(':gvr-android-sdk/libraries:panowidget')
    compile project(':gvr-android-sdk/libraries:videowidget')
}
Settings.gradle : 
This code belongs to settings.gradle file
include ':app'
include ':app'
include ':gvr-android-sdk/libraries:audio'
include ':gvr-android-sdk/libraries:base'
include ':gvr-android-sdk/libraries:common'
include ':gvr-android-sdk/libraries:commonwidget'
include ':gvr-android-sdk/libraries:panowidget'
include ':gvr-android-sdk/libraries:videowidget'
 
     
     
     
     
     
    