* Generate QR code images
Now generates QR images instead of attempting to display the QR code in the console. Places them in a subdirectory of the current directory, entitled "qr"
* Update README.md
* Changes based on suggestions from scito
https://github.com/scito/extract_otp_secret_keys/pull/2#pullrequestreview-555264890
* Update extract_otp_secret_keys.py
Minor formatting changes and clarifications to help text
* Update extract_otp_secret_keys.py
Remove --qr argument, instead opting to respond to --printqr or --saveqr
arg_parser.add_argument('--qr','-q',help='print QR codes (otpauth://...)',action='store_true')
arg_parser.add_argument('--saveqr','-s',help='save QR code(s) as images to the "qr" subfolder',action='store_true')
arg_parser.add_argument('--printqr','-p',help='print QR code(s) as text to the terminal',action='store_true')
arg_parser.add_argument('infile',help='file or - for stdin (default: -) with "otpauth-migration://..." URLs separated by newlines, lines starting with # are ignored')