CFFA (#20)

* CFFA

* CFFA multi-disk and write functionaliity.

* Clean up multi-devices/partition behavior.

* ProDOS WIP

* Update against refactored codebase.

* WIP

* Wait until disks load, show progress.

* Don't wait so long to boot floppies.

* Forgot to save :|.

* Credit.

css/apple2.css

@@ -230,6 +230,19 @@ canvas {
     line-height: 14px;
 }
 
+#loading-modal .meter {
+    width: 200px;
+    height: 15px;
+    background-color: black;
+    border: 1px inset #888;
+}
+
+#loading-modal .progress {
+    position: absolute;
+    height: 15px;
+    background-color: #0f0;
+}
+
 .modal {
     display: none;
 }
@@ -609,3 +622,8 @@ button:focus {
     font-family: monospace;
     white-space: pre;
 }
+
+#alert-modal-content {
+    min-width: 200px;
+    min-height: 50px;
+}