* pySim-shell.py: add a command for RUN GSM ALGORITHM
* SimCardCommands.run_gsm(): use send_apdu_checksw()
* fix SimCardCommands.run_gsm(): always use CLA=0xa0
* commands: Add method to select parent DF ("cd ..")
* cosmetic: Remove extraneous empty lines between spec-section-comment and class
* USIM + ISIM: Specify the services associated with each file
* filesystem: Maintain a 'service' attribute for all files on a card
* pySim-shell: introduce 'apdu' command for sending raw APDU to card
* pySim-shell: export: allow export as JSON instead of hex