Replaced frontend getString calls broken in d3c158f.

Closes #224

js/options.js

@@ -54,7 +54,7 @@
                     if (request.path == "/v1/address" && request.verb == "PUT") {
                         var proto = textsecure.protobuf.ProvisioningUuid.decode(request.body);
                         var url = [ 'tsdevice:/', '?uuid=', proto.uuid, '&pub_key=',
-                            encodeURIComponent(btoa(getString(cryptoInfo.pubKey))) ].join('');
+                            encodeURIComponent(btoa(String.fromCharCode.apply(null, new Uint8Array(cryptoInfo.pubKey)))) ].join('');
                         $('#status').text('');
                         qrCode.makeCode(url);
                         request.respond(200, 'OK');

js/register.js

@@ -85,7 +85,7 @@
         var verificationCode = $('#code').val().replace(/\D+/g, "");
         var signalingKey = textsecure.crypto.getRandomBytes(32 + 20);
 
-        var password = btoa(getString(textsecure.crypto.getRandomBytes(16)));
+        var password = btoa(String.fromCharCode.apply(null, new Uint8Array(textsecure.crypto.getRandomBytes(16))));
         password = password.substring(0, password.length - 2);
 
         var registrationId = new Uint16Array(textsecure.crypto.getRandomBytes(2))[0];