Nesting freeze_time doesn't work with time.time()

@freeze_time('2015-01-01')
def test_method(self):
    print time(), datetime.utcnow()
    with freeze_time('2015-01-01T00:06:00'):
        print time(), datetime.utcnow()

Yields:

1420070400.0 2015-01-01 00:00:00
1420070400.0 2015-01-01 00:06:00

$ pip show freezegun

---
Name: freezegun
Version: 0.3.5
Location: /home/____/paxon/env/lib/python2.7/site-packages
Requires: six, python-dateutil

[boxed]

From a very cursory inspection of api.py it looks like this is the start of the problem:

        datetime.datetime = FakeDatetime
        datetime.date = FakeDate
        fake_time = FakeTime(time_to_freeze, time.time)
        fake_localtime = FakeLocalTime(time_to_freeze, time.localtime)
        fake_gmtime = FakeGMTTime(time_to_freeze, time.gmtime)
        fake_strftime = FakeStrfTime(time_to_freeze, time.strftime)

and later

        datetime.datetime.times_to_freeze.append(time_to_freeze)
        datetime.datetime.tz_offsets.append(self.tz_offset)

        datetime.date.dates_to_freeze.append(time_to_freeze)
        datetime.date.tz_offsets.append(self.tz_offset)

The nesting works because the second block, which is not implemented for the birst blocks. It looks like the code could be simplified a lot if this was unified too, so instead of

        datetime.date.dates_to_freeze.append(time_to_freeze)
        datetime.date.tz_offsets.append(self.tz_offset)

you could have

for foo in fakes:
    foo.times_to_freeze.append(time_to_freeze)
    foo.tz_offsets.append(self.tz_offset)

or similar but better named obviously.

[spulec]

Closed with #260