* Use the generic method read_binary of card class to read PLMNsel
* pySim-read.py: Use the method declared in cards.py to read SPN
* Use the generic method read_record of card class to read SMSP
* Use read_binary function of card class to read GID2 and reduce code duplication
* cards.py: Add generic function to read EF record in card class
* cards.py: Add generic function to read EF binary to card class
* Move parsing of GID2 to generic Card class
