title: What are activator and activator-launch-1.2.10.jar files in a new project with playframework2.0?
body: <p>I am currently doing the official playframework tutorial : <a href="https://www.playframework.com/documentation/2.3.x/Tutorials" rel="noreferrer">https://www.playframework.com/documentation/2.3.x/Tutorials</a>. The tutorial recommends to use activator tool by Typesafe. I don't understand why I get another activator file when I create a new project. </p>
  
  <p>When I create a project with the following command line :</p>
  
  <pre><code>activator new test-app play-java
  </code></pre>
  
  <p>My terminal displays: </p>
  
  <pre><code>Fetching the latest list of templates...
  
  OK, application "test-app" is being created using the "play-java" template.
  
  To run "test-app" from the command line, "cd test-app" then:
  /Users/XXXXX/Documents/Developpements/play-sandbox/test-app/activator run
  
  To run the test for "test-app" from the command line, "cd test-app" then:
  /Users/XXXXX/Documents/Developpements/play-sandbox/test-app/activator test
  
  To run the Activator UI for "test-app" from the command line, "cd test-app" then:
  /Users/XXXXX/Documents/Developpements/play-sandbox/test-app/activator ui
  </code></pre>
  
  <p>I can observe this in test-app directory :</p>
  
  <pre><code>    442  1 oct 01:01 .
      238  1 oct 01:01 ..
      141  1 oct 01:01 .gitignore
      591  1 oct 01:01 LICENSE
      148  1 oct 01:01 README
     9680  1 oct 01:01 activator
  1188339  1 oct 01:01 activator-launch-1.2.10.jar
      136  1 oct 01:01 app
      215  1 oct 01:01 build.sbt
      136  1 oct 01:01 conf
      136  1 oct 01:01 project
      170  1 oct 01:01 public
      136  1 oct 01:01 test
  </code></pre>
  
  <p>I don't understand the aim of <code>activator</code> and <code>activator-launch-1.2.10.jar</code>. When I delete these files and I use the activator command line it seems to work perfectly.</p>
  
  <p>Are they important ? Can I delete them ? Should I include them in my .gitignore file ? </p>
  
  <p>Thanks !</p>