update gui for camera mods

QtMeshViewer/Resources/Resources.qrc

@@ -21,5 +21,8 @@
         <file>light_on.png</file>
         <file>solid.png</file>
         <file>settings.png</file>
+        <file>freeCamera.png</file>
+        <file>orbitalCamera.png</file>
+        <file>walkCamera.png</file>
     </qresource>
 </RCC>

QtMeshViewer/Resources/StyleSheet.txt

@@ -37,6 +37,18 @@ QToolButton#screenshot {
 	image: url(:/images/toolbar/screenshot.png);
 }
 
+QToolButton#freeCamera {
+	image: url(:/images/toolbar/freeCamera.png);
+}
+
+QToolButton#orbitalCamera {
+	image: url(:/images/toolbar/orbitalCamera.png);
+}
+
+QToolButton#walkCamera {
+	image: url(:/images/toolbar/walkCamera.png);
+}
+
 QToolButton#wireframe {
 	image: url(:/images/toolbar/solid.png);
 }