- Changed where showusage is checked - Modifed process flow so curses is never used to print command-line usage   string (this is the only error that's should be printed to stdout, with   the exception of signal traps)
- Changed where showusage is checked
- Modifed process flow so curses is never used to print command-line usage
  string (this is the only error that's should be printed to stdout, with
  the exception of signal traps)

disassembler/Lifelines,MarcNo/lifelines,MarcNo/lifelines,disassembler/Lifelines,disassembler/Lifelines,disassembler/Lifelines,MarcNo/lifelines,MarcNo/lifelines