Added passphrase generator script

scripts/README.md

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+This directory contains useful scripts and utilities that don't make sense to include as official Onionr features.
+
+passphrase-generator.py: very simple utility to generate and print a strong passphrase to stdout. 256 bits of entropy by default.

scripts/passphrase-generator.py

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+#!/usr/bin/env python3
+
+"""Generate a 16 word passphase with 256 bits of entropy.
+
+Specify true to reduce to 128 bits"""
+
+
+import sys
+
+import niceware
+
+byte_count = 32  # 256 bits of entropy with niceware
+
+arg = False
+try:
+    arg = sys.argv[1].lower()
+    if arg == 'true':
+        byte_count = 16
+except IndexError: pass
+
+print(' '.join(niceware.generate_passphrase(byte_count)))