Fixes names of images in css.

css/main.css

 
 #brand_logo
 {
-    background-image:url(../images/welcome_page/unicef-logo.png);
+    background-image:url(../images/welcome_page/brand-logo.png);
     width: 215px;
     height: 55px;
     position: absolute;
 
 #brand_header
 {
-    background-image:url(../images/welcome_page/unicef-header-big.png);
+    background-image:url(../images/welcome_page/header-big.png);
     position:absolute;
     width: 583px;
     height: 274px;

index.html

             <a href="http://jitsi.org" target="_new">
                 <div id="jitsi_logo"></div>
             </a>
-            <a href="http://unicefuganda.org/" target="_new">
-                <div id="brand_logo"></div>
-            </a>
+
             <div id="enter_room">
                 <input id="enter_room_field" type="text" placeholder="Enter room name" />
                 <input id="enter_room_button" type="button" value="GO" />
             </div>
             <div id="brand_header"></div>
-            <div id="header_text">
-                Welcome to uTalk! A free and open-source WebRTC video conferencing system developed by BlueJimp and UNICEF Uganda in collaboration with the Jitsi.org community.
-            </div>
+            <div id="header_text"></div>
         </div>
         <div id="welcome_page_main">
             <div id="features">