Update Transition guide.md

I updated the information on how to get data from an instance of `PPUsdlRecognizerResult`.  This may need to be removed once the framework is updated to include a `data` selector in `PPUsdlRecognizerResult`.

-- Austin O'Neil, DealerSocket

Transition guide.md

@@ -59,7 +59,7 @@
 
         `PPZXingRecognizerResult` which holds the results of ZXing scanning
 
-    - `PPScanningResult` had getters for `data`, `rawData`, `uncertain` and `type` properties. Each new class has equivalent `data`, `rawData` and `uncertain` properties. New classes (except PDF417 and USDL) have `barcodeType` property with the same function. PDF417 and USDL classes don't have type since they are always obtained by scanning PFDF417 barcode.
+    - `PPScanningResult` had getters for `data`, `rawData`, `uncertain` and `type` properties. Each new class has equivalent `data`, `rawData` and `uncertain` properties. New classes (except PDF417 and USDL) have `barcodeType` property with the same function. PDF417 and USDL classes don't have type since they are always obtained by scanning PFDF417 barcode. To get data in `PPUsdlRecognizerResult`, you will need to do `NSString* message = [[result getAllStringElements] valueForKey:@"pdf417"];`, assuming that `result` is the `PPUsdlRecognizerResult` instance.
 
     - For easier integration new classes have new getters `stringUsingGuessedEncoding` which guesses the encoding string inside barcode data. Use this if you know data is textual, but you don't know the exact encoding of the string. 
 
@@ -68,4 +68,4 @@
         - All calls to `resumeScanning` replace with `resumeScanningAndResetState:YES`.
         - All calls to `resumeScanningWithoutStateReset` replace with `resumeScanningAndResetState:NO`
 
-- Remove all references to `updateScanningRegion` method since it's now being called automatically in `setScanningRegion` setter.
+- Remove all references to `updateScanningRegion` method since it's now being called automatically in `setScanningRegion` setter.