Simple Reservation Reference number and Barcode

[kewls637]

Instead of a complicated Reservation Reference number which looks like an encryption code, lets have a simple short number. Along this number lets have a Barcode automatically generated.

[JohnVillalovos]

As a note. If you want any of these issues resolved you will most likely need to create pull requests to resolve the issues. Otherwise it is unlikely that anyone else will do it, unless they want to fix the issue also.