title: spring-boot gradle plugin can't be found
body: <p>I have a separate gradle script that is just adding spring-boot plugin. It looks like this:</p>
  
  <pre><code>buildscript {
      repositories {
          mavenLocal()
          mavenCentral()
          maven { url 'http://repo.spring.io/libs-release' }
      }
      dependencies {
          classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.1.8.RELEASE'
      }
  }
  
  apply plugin: 'spring-boot'
  </code></pre>
  
  <p>Then, in another project, it is referenced like this:</p>
  
  <pre><code>apply from: '../../food-orders-online-main/spring-boot.gradle'
  </code></pre>
  
  <p>When I run build task I'm getting the following error:</p>
  
  <pre><code>A problem occurred evaluating script.
  &gt; Failed to apply plugin [id 'spring-boot']
  &gt; Plugin with id 'spring-boot' not found.
  </code></pre>
  
  <p>Someone knows what I'm doing wrong?</p>