better printing of configure error messages

import os

import sys

import logging

from django.core import management

from django.core import management, exceptions

class ManagementUtility(management.ManagementUtility):

	def fetch_command(self, subcommand):

		from django.core.management.commands.runserver import Command

		try:

			from django.conf import settings

			from django.core.management.commands.runserver import Command

		except (exceptions.ImproperlyConfigured) as exc:

			sys.stderr.write(

				"cannot run '{0}' due to improperly configured settings: {1}\n"

				.format(subcommand, exc)

			);

			sys.exit(1)

		class RunserverCommand(Command):

			def run(self, **options):