Clean up the imports in loaddata.py to match other code whilst I'm in the neighbourhood.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9538 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/management/commands/loaddata.py

-from django.core.management.base import BaseCommand
-from django.core.management.color import no_style
-from optparse import make_option
 import sys
 import os
-import bz2, gzip, zipfile
+import gzip
+import zipfile
+from optparse import make_option
+
+from django.core.management.base import BaseCommand
+from django.core.management.color import no_style
 
 try:
     set