Loop added

Added code to RFID test to make the file run in a loop.
There is still a weird ass bug that makes it crash when the reader
changes states as it reads the card. Needs to be looked at to see if
there is a possible fix.
loop fixed

Mean time solution with Thread.sleeps to make it less likely that the
user will remove the card at the wrong time
removed unused boolean

boolean kaartGelezen was unused and therefore deleted.