title: slimframework request->headers don´t read Authorization
body: <p>i´m trying to implement a simple authorization with slim on serverside and angularJS on client side. For Testing the REST APi i´m using a program called Rested for Mac which allows to send rest calls.</p>
  
  <p>I want to deliver, once authorization has completed, at each rest call an jwt token which can than be used within slim to authorize requests for certain paths.</p>
  
  <p>Now i deliver via Rested the following header and body:</p>
  
  <pre><code>Accept: */* 
  Accept-Encoding: gzip, deflate 
  Content-Type: application/json 
  Authorization: jwt-test 
  Accept-Language: de-de
  
  { 
    "login": "TestLogin", 
    "password": "TestPassword", 
    "uuid": "dsfglj45690dfgkl456" 
  }
  </code></pre>
  
  <p>And than just print out the whole header:</p>
  
  <pre><code>Slim\Http\Headers Object ( [data:protected] =&gt; Array ( [Host] =&gt; localhost:8888 
  [Content-Type] =&gt; application/json [Content-Length] =&gt; 89 [Connection] 
  =&gt; keep-alive [Accept] =&gt; */* [User-Agent] =&gt; Rested/2009 CFNetwork/673.4 
  Darwin/13.4.0 (x86_64) (iMac13%2C2) [Accept-Language] =&gt; de-de [Accept-Encoding] 
  =&gt; gzip, deflate ) )
  </code></pre>
  
  <p>As you can see, there is no Authorization within this array.</p>
  
  <p>I also checked this with firefox directly, same results. O can see Authorization string within the request headers with firebug, but it is not in the dumped array at slimframework.</p>
  
  <p>Does anyone has a hint where my problem lies?</p>
  
  <p>Thanks in advance and kind regards</p>
  
  <p>solick</p>