FIX: adding a test to see if we managed to get the correct demodulation from an...

FIX:  adding a test to see if we managed to get the correct demodulation from an unknown t55x7 tag.
   By checking if the configuration data (page 0, block 0)  has some settings that must be the same.   think  reserved 7bits, This is a trail and error approach.
But together with setting a manual configuration to read a tag and this automatic verification it will help out alot I think.