Added chat functionality & timer back into the game + bug fixes

- Added chat back into the game
- Fixed a bug where the timer would show "race finished" when the race hadn't started
- Fixed a bug where resources weren't being deallocated when the game was closed

Tags: #story[1246]

src/main/resources/css/raceView.css

@@ -0,0 +1,16 @@
+#timerGrid{
+    -fx-background-color: rgba(255, 255, 255, 0.6);
+}
+
+#timerLabel{
+    -fx-font-size: 21px;
+    -fx-font-family: "Baloo";
+}
+
+#chatArea{
+    -fx-background-color: rgba(255, 255, 255, 0.6);
+}
+
+#raceInfoArea{
+    -fx-background-color: rgba(255, 255, 255, 0.6);
+}