Add a toolbar above the on-screen keyboard with extra keys that are missing from iOS keyboard (#576)

* Add required images to assets

* Add toolbar above keyboard with more key options

* Fix tvOS errors

Limelight/Images.xcassets/Contents.json

@@ -1,6 +1,6 @@
 {
   "info" : {
-    "version" : 1,
-    "author" : "xcode"
+    "author" : "xcode",
+    "version" : 1
   }
-}
+}