fix logo - return to white bg

assets/css/browser-solidity.css

@@ -108,7 +108,8 @@ body {
 
 #header #solIcon {
     float: left;
-    height: 5em;
+    height: 5.1em;
+    background-color: white;
 }
 
 #header #menu {

index.html

@@ -64,7 +64,7 @@ THE SOFTWARE.
 	<div id="righthand-panel">
 		<div id="header">
 			<div id="menu">
-				<img id="solIcon" title="Solidity realtime compiler and runtime" src="assets/img/sol.gif" alt="Solidity realtime compiler and runtime">
+				<img id="solIcon" title="Solidity realtime compiler and runtime" src="assets/img/sol.svg" alt="Solidity realtime compiler and runtime">
 				<ul id="options">
 					<li class="txView active"><i class="fa fa-send"></i></li>
 					<li class="envView"><i class="fa fa-cube"></i></li>