Added Copyright for vis.js

Author: sarutak

LICENSE

@@ -836,6 +836,22 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
+========================================================================
+For vis.js (core/src/main/resources/org/apache/spark/ui/static/vis.min.js):
+========================================================================
+Copyright (C) 2010-2015 Almende B.V.
+
+Vis.js is dual licensed under both
+
+  * The Apache 2.0 License
+    http://www.apache.org/licenses/LICENSE-2.0
+
+and
+
+  * The MIT License
+    http://opensource.org/licenses/MIT
+
+Vis.js may be distributed under either license.
 
 ========================================================================
 BSD-style licenses

core/src/main/resources/org/apache/spark/ui/static/timeline-view.css

@@ -19,7 +19,7 @@ div#application-timeline, div#job-timeline {
   margin-bottom: 30px;
 }
 
-#application-timeline div.legend-area ,
+#application-timeline div.legend-area,
 #job-timeline div.legend-area {
   margin-top: 5px;
 }