title: git add submodule without repo name
body: <p>I have 2 repositories at github: 1st is for a cURL library, 2nd is for a project I'm writing. I'm trying to add my library as submodule to my project:</p>
  
  <pre><code>cd /www/fifa14api/CI-FIFA14-API/
  git submodule add git@github.com:ctepeo/CI-cURL.git
  </code></pre>
  
  <p>My project based on CodeIgniter, so file structure looks like</p>
  
  <pre><code>/application/
  /system/
  index.php
  </code></pre>
  
  <p>My library at repo have prepared for CodeIgniter structure:</p>
  
  <pre><code>/application/
       /libraries/
           curl.php
  </code></pre>
  
  <p>When I add submodule, I want to "merge" them (to put my curl.php at right directory in project), but it creates CI-cURL <em>(repo name)</em> folder at root, so I got</p>
  
  <pre><code>/application/
  /system/
  /CI-cURL/
      /application/
          curl.php
  index.php
  </code></pre>
  
  <p>How can I (and is it possible?) to exclude repository's name when adding submodule?</p>