Added some quality of life features

- Now preload the letters on successive rows
- Hid the keyboard during intermissions
- Added a give-up easter egg when tapping the enter six times
- Reshuffled the letters

site/index.html

@@ -30,10 +30,13 @@
       </div>
       <div class="keyboard" data-controller="keyboard"
            data-keyboard-playfield-outlet=".playfield"
+           style="display: none;"
            data-action="
               keydown@window->keyboard#onKeyPress
               guessResults@window->keyboard#colorizeKeys
               resetKeyColors@window->keyboard#resetKeyColors
+              showKeyboard@window->keyboard#onShow
+              hideKeyboard@window->keyboard#onHide
             ">
           <div>
               <button data-keyboard-target="key" data-action="keyboard#tappedKey" data-key="q">q</button>