Remove unused imports and group them

Many imports are not used like threading and glob. Similar imports can be grouped too.

This looks better:

import os, sys, platform
import tempfile, shutil, filecmp
import multiprocessing, subprocess
import signal, atexit
import re
import time
import traceback
if sys.version_info < (3, 0):
 import urllib2
 globals()['urlopen'] = urllib2.urlopen
else:
 import urllib.request
 globals()['urlopen'] = urllib.request.urlopen