add mixed reality screenshots

index.html

@@ -58,9 +58,9 @@
           <p>We've <a href="https://github.com/supermedium/supersaber">open sourced</a> the code and assets for free for everyone to learn.</p>
         </div>
         <div class="screenshots">
-          <img src="site/assets/screenshots/supersaber12.jpg">
+          <img src="site/assets/screenshots/screenshotmr2.jpg">
           <img src="site/assets/screenshots/supersaber06.jpg">
-          <img src="site/assets/screenshots/supersaber13.jpg">
+          <img src="site/assets/screenshots/supersaber12.jpg">
         </div>
       </section>
 
@@ -82,7 +82,7 @@
         <div class="screenshots">
           <img src="site/assets/screenshots/supersaber07.jpg">
           <img src="site/assets/screenshots/supersaber17.jpg">
-          <img src="site/assets/screenshots/supersaber11.jpg">
+          <img src="site/assets/screenshots/screenshotmr1.jpg">
         </div>
       </section>