Implemented WebSockets for GUI2

Change-Id: I4776ce392b1e8e94ebee938cf7df22791a1e0b8f
diff --git a/web/gui2/src/main/webapp/onos.theme.css b/web/gui2/src/main/webapp/onos.theme.css
new file mode 100644
index 0000000..dc14c80
--- /dev/null
+++ b/web/gui2/src/main/webapp/onos.theme.css
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2016-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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.
+ */
+
+/*
+ ONOS GUI -- core (theme) -- CSS file
+ */
+
+body {
+    background-color: white;
+}
+
+html {
+    font-family: 'Open Sans', sans-serif;
+    -webkit-text-size-adjust: 100%;
+    -ms-text-size-adjust: 100%;
+    height: 100%;
+}
+
+/*
+   overflow hidden is to ensure that the body does not expand to account
+   for any flyout panes, that are positioned "off screen".
+ */
+body {
+    height: 100%;
+    margin: 0;
+    overflow: hidden;
+}
+
+#view h2 {
+    color: #3c3a3a;
+}
+
+a {
+    color: #009fdb;
+    text-decoration: none;
+}
+a:hover {
+    text-decoration: underline;
+}
+a:visited {
+    color: #7fabdb;
+    text-decoration: none;
+}
+
+/* ========== DARK Theme ========== */
+
+body.dark {
+    background-color: #282528;
+}
+
+.dark #view h2 {
+    color: #6a6e6a;
+}
+
+.dark a {
+    color: #007ca6;
+}
+.dark a:visited {
+    color: #4f6e90;
+}
+
+.dark input {
+    color: #dddddd;
+    background-color: #222222;
+    border: 1px solid #666666;
+}
+
+.dark select {
+    color: #dddddd;
+    background-color: #222222;
+}
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