Show warnings correctly.

index.html

@@ -392,8 +392,9 @@ THE SOFTWARE.
 		var detailsOpen = {};
 
 		var renderError = function(message) {
+			var type = message.match(/^[0-9:]* Warning: /) ? 'warning' : 'error';
 			$('#output')
-				.append($('<pre class="error"></pre>').text(message));
+				.append($('<pre class="' + type + '"></pre>').text(message));
 			var err = message.match(/^:([0-9]*):([0-9]*)/)
 			if (err && err.length) {
 				var errLine = parseInt(err[1], 10) - 1;
@@ -402,7 +403,7 @@ THE SOFTWARE.
 					row: errLine,
 					column: errCol,
 					text: message,
-					type: "error"
+					type: type
 				};
 				editor.getSession().setAnnotations(sourceAnnotations);
 			}

stylesheets/browser-solidity.css

@@ -213,12 +213,6 @@ body {
     float: right;
 }
 
-.solError {
-    position: absolute;
-    background-color: rgba(255, 0, 0, 0.2);
-    z-index:40;
-}
-
 .error {
     background-color: rgba(255, 0, 0, 0.5);
     border-radius: 0;
@@ -226,6 +220,13 @@ body {
     border: 1px solid #D00909;
 }
 
+.warning {
+    background-color: rgba(210, 202, 36, 0.5);
+    border-radius: 0;
+    word-wrap: break-word;
+    border: 1px solid #D00909;
+}
+
 #ghostbar {
     width: 1px;
     background-color: red;