MainWindow: Added Game menu with "New game" and "Exit" items.

WIP on #7.

Author: Kaffeine

MainWindow.ui

@@ -29,6 +29,14 @@
      <height>19</height>
     </rect>
    </property>
+   <widget class="QMenu" name="menu_Game">
+    <property name="title">
+     <string>&amp;Game</string>
+    </property>
+    <addaction name="action_NewGame"/>
+    <addaction name="actionExit"/>
+   </widget>
+   <addaction name="menu_Game"/>
   </widget>
   <widget class="QToolBar" name="mainToolBar">
    <attribute name="toolBarArea">
@@ -39,6 +47,22 @@
    </attribute>
   </widget>
   <widget class="QStatusBar" name="statusBar"/>
+  <action name="action_NewGame">
+   <property name="text">
+    <string>&amp;New game</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+N</string>
+   </property>
+  </action>
+  <action name="actionExit">
+   <property name="text">
+    <string>E&amp;xit</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Q</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources/>