Description of problem:
Nikola will not run due to missing version dependency in Fedora 23. Nikola requires python-dateutil==2.4.1, however python-dateutil==2.4.2 is in the repository.

Version-Release number of selected component (if applicable):
python-nikola-7.3.1-3.fc23.noarch

How reproducible:
everytime

Steps to Reproduce:
1. dnf install python-nikola
2. nikola init testsite
3. crash!

Actual results:
[david@example ~]$ nikola init testsite
Traceback (most recent call last):
  File "/usr/bin/nikola", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3084, in <module>
    @_call_aside
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3070, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3097, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 653, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 666, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 839, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'python-dateutil==2.4.1' distribution was not found and is required by Nikola


Expected results:
$ nikola init --demo my_first_site
Creating Nikola Site
====================

This is Nikola.  We will now ask you a few easy questions about your new site.
If you do not want to answer and want to go with the defaults instead, simply restart with the `-q` parameter.
--- Questions about the site ---
Site title [My Nikola Site]: My First Nikola Site
...a couple more questions...

That's it, Nikola is now configured.  Make sure to edit conf.py to your liking.
If you are looking for themes and addons, check out https://themes.getnikola.com/ and https://plugins.getnikola.com/.
Have fun!
INFO: init: A new site with example data has been created at my_first_site.
INFO: init: See README.txt in that folder for more information.


Additional info: