title: error with composor (install / update ) with laravel 4.2
body: <p>installed laravel template built on version 4.2 , when i make composer (install / update) I still have this error with composer .</p>
  
  <blockquote>
    <p>Problem 1<br>
    - Installation request for d11wtq/boris v1.0.10 -> satisfiable by d11wtq/boris[v1.0.10].<br>
    - d11wtq/boris v1.0.10 requires ext-pcntl * -> the requested PHP extension pcntl is missing from your system.<br>
    Problem 2<br>
    - d11wtq/boris v1.0.10 requires ext-pcntl * -> the requested PHP extension pcntl is missing from your system.<br>
    - laravel/framework v4.2.17 requires d11wtq/boris ~1.0 -> satisfiable by d11wtq/boris[v1.0.10].<br>
    - Installation request for laravel/framework v4.2.17 -> satisfiable by laravel/framework[v4.2.17].</p>
  </blockquote>