title: Composer can't find ext-mbstring even though it is installed
body: <p>When I attempt to install Laravel 5 I get a dependency error. I'm using Uniform Server on Windows 7. I have enabled php_mbstring.dll and I checked it's loading properly. (I think)</p>
  
  <p>Here is the console output (Composer):</p>
  
  <p><img src="https://i.stack.imgur.com/N47Qs.png" alt="Composer dependency error when installing laravel 5"></p>
  
  <p>Here are the extensions in my php.ini
  <img src="https://i.stack.imgur.com/DpDgt.png" alt="Php.ini extensions"></p>
  
  <p>Here are the phpinfo() mbstring details:
  <img src="https://i.stack.imgur.com/TYaww.png" alt="mbstring installed"></p>
  
  <p>I don't know where to go from here.
  Any idea?</p>