Update header.html

Updated header from 2 col design to one column to make image larger

_includes/header.html

@@ -1,33 +1,11 @@
 <header>
     <div class="container">
-        <div class="row">
-            <div class="col-sm-7">
               <div class="header-content">
-                    <div class="header-content-inner">
+                        <img src="img/MockUp.png" class="img-responsive" alt="">
                         <h1>Your personal media assistant!</h1>
                         <p>A simple way for your shared media users to request and download content - automatically! Learn how to get up and running in 5 minutes, below.</p>
                         <a href="#why" class="btn btn-filled btn-xl page-scroll">Learn More &darr;</a>
                         <a href="https://github.com/tidusjar/Ombi/releases/latest" class="btn btn-outline btn-xl page-scroll">Install</a>
                 </div>
             </div>
-            </div>
-            <div class="col-sm-5">
-                <div class="device-container">
-                    <img src="img/MockUp.png" class="img-responsive" alt="">
-         <!-- Old code for iPhone mock-up
-                      <div class="device-mockup iphone6_plus portrait white">
-                        <div class="device">
-                            <div class="screen">
-                                 Demo image for screen mockup, you can put an image here, some HTML, an animation, video, or anything else! 
-                              <img src="img/search.png" class="img-responsive" alt="">
-                                </div>
-                            <div class="button">
-                                 You can hook the "home button" to some JavaScript events or just remove it 
-                             </div>
-                        </div>
-                    </div>-->
-                </div>
-            </div>
-        </div>
-    </div>
 </header>