title: Unable to use the apache.poi library after adding gradle dependency
body: <p>I've been trying to use the apache.poi library to create an excel file but, for some reason, I'm unable to import anything.</p>
  
  <pre><code>mainClassName = 'Main'
  sourceCompatibility = 1.7
  targetCompatibility = 1.7
  version = '1.0'
  
  repositories {
      mavenCentral()
  }
  
  dependencies {
      compile 'com.google.api-client:google-api-client:1.22.0'
      compile 'com.google.oauth-client:google-oauth-client-jetty:1.22.0'
      compile 'com.google.apis:google-api-services-sheets:v4-rev21-1.22.0'
  
      compile 'org.apache.poi:poi:3.9'
  }
  </code></pre>
  
  <p>When I am trying to write import org.apache.poi; it gives me an error saying "Package does not exist".
  What is wrong with my dependencies? Thanks.</p>