Android studio gradle dependencies not loaded - android-studio

Question

I am using Android Studio to develop an Android application and I am using Gradle to handle the build. When I try to compileDebug the project, I errors that some libraries aren't found. These libraries are included in the build.gradle file and should be linked by gradle. Since the libraries aren't found at compilation, I think these files aren't linked correctly by gradle.
Can anyone have a look at the configuration file and look for anything wrong with it? Thanks:
buildscript {
repositories {
maven { url 'http://repo1.maven.org/maven2' }
mavenCentral()
}
dependencies {
//classpath 'com.android.tools.build:gradle:0.6.+'
classpath 'com.android.tools.build:gradle:1.1.0'
}
}
apply plugin: 'android'
repositories {
maven {
url 'https://github.com/Goddchen/mvn-repo/raw/master/'
}
mavenCentral()
}
dependencies {
compile 'com.android.support:support-v4:13.0.0'
compile 'com.google.android.gms:play-services:3.1.36'
compile 'com.google.code.gson:gson:2.2.4'
//compile 'com.codeslap:persistence:0.9.24'
compile 'org.apache.commons:commons-io:1.3.2'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.8.4'
//compile 'com.facebook.android:facebook:3.5.2'
compile 'com.facebook.android:facebook:3.17.1'
compile files('libs/rollbar-android-0.0.6.jar')
compile files('libs/libGoogleAnalyticsV2.jar')
//compile files('libs/commons-codec-1.7-SNAPSHOT-android.jar')
compile files('libs/tinylinetry_and.jar')
}
android {
compileSdkVersion 18
buildToolsVersion '19.1.0'
defaultConfig {
minSdkVersion 14
targetSdkVersion 18
}
signingConfigs {
release {
storeFile file("../keystore.jks")
storePassword "******"
keyAlias "Android Release Key"
keyPassword "******"
}
}
buildTypes {
debug {
applicationIdSuffix ".debug"
}
release {
signingConfig signingConfigs.release
}
}
}
The error I get is from this kind:
:app:compileDebugJava
.../Application.java:55: error: package com.rollbar.android does not exist
import com.rollbar.android.Rollbar;
....
FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:compileDebugJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
So all external libraries that are loaded and should be included by gradle aren't found.