rm unused imports
factor out the M2Crypto check to flashproxy.keys
migrate reg methods to argparse
localise unnecessary global variables
migrate flashproxy-client to argparse
localise some unnecessary global variables
localise and simplify build_register_command
move common functionality and command-line options into flashproxy-common
- move keys.DEFAULT_FACILITATOR_PUBKEY_PEM into new reg module to be with other default-facilitator data
in reg methods, mention how the client registration address is worked out