Displaying the pattern on crash is now default off
* backfuzz.py
  -- When fuzzing with incredibly long patterns, a crash will
     render the terminal unusable and obfuscate all the
	 necessary information to debug a crash.  Displaying the
	 pattern is unnecessary unless requested by the user.
	 The -S flag has been added for this.
* functions.py
  -- Added a check before printing payload
* globalvars.py
  -- Added the show_pattern var