Added images

Author: eddiejaoude

_includes/header.html

@@ -8,13 +8,13 @@
       </ol>
       <div class="carousel-inner" role="listbox">
         <div class="carousel-item active">
-          <img src="https://camo.githubusercontent.com/9774ef0872671d1efb60aa2e4e78e5c3ba55ea16/68747470733a2f2f696e666f2e74686f75676874776f726b732e636f6d2f72732f3139392d5144452d3239312f696d616765732f4861636b4272657869742e706e67" alt="HackBrexit Logo">
+          <img src="img/hackbrexit.png" alt="HackBrexit Logo">
         </div>
         <div class="carousel-item">
-          <img src="https://pbs.twimg.com/media/CoDM7qyWIAANsIC.jpg" alt="Second slide">
+          <img src="img/panel.jpg" alt="Second slide">
         </div>
         <div class="carousel-item">
-          <img src="https://pbs.twimg.com/media/CoGYrtFWcAAJpTl.jpg" alt="Third slide">
+          <img src="img/panel-audience.jpg" alt="Third slide">
         </div>
       </div>
       <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">