Spurious "scheduled to be published in the future" warning
Using Nikola 7.5.1 on Python 3, I get messages of the form

```
[2015-06-30T18:03:48Z] NOTICE: Nikola: path/to/post.rst is scheduled to be published in the future (2015-06-30 18:00:00+00:00)
```

As can be seen from the timestamps, this message isn't even self-consistent.

I tried different ways of expressing the time zone (UTC, local time etc) and nothing works except setting the publication time over an hour into the past in UTC. My local time is currently UTC+1; perhaps Nikola is applying the timezone offset twice?

diff --git a/nikola/post.py b/nikola/post.py
index 466d5e07e..b1892dcf4 100644
--- a/nikola/post.py
+++ b/nikola/post.py
@@ -102,7 +102,7 @@ class Post(object):
         if self.config['FUTURE_IS_NOW']:
             self.current_time = None
         else:
-            self.current_time = current_time()
+            self.current_time = current_time(tzinfo)
         self.translated_to = set([])
         self._prev_post = None
         self._next_post = None
['nikola/post.py']