minor bug fixes

Everywhere:
- commenting out use of print_bytes until I have time to figure out why
Ubuntu/gcc doesn't like it (debug code, so non-critical now)
- more whitespace

Makefiles:
- addition of -fstack-protector-strong (which apparently only is
supported under Fedora, despite Ubuntu's automagical use with gcc) to
better detect buffer overruns

parcel.cpp:
- added routine to get ip address of current machine, changed
run_ssh_command to use it to send proper username/IP back (not sure how
that ever worked)
- fixed handling of arguments so the case of no args is detected instead
of crashing

testParcel.py:
- debug output