Error running `pip install -r requirements-dev.txt`

[primordialstew]

When trying to install the dev requirements using pip install, I run into the following error:

$ pip install -r requirements-dev.txt
Collecting pytest==2.5.1 (from -r requirements-dev.txt (line 5))
Collecting py==1.4.19 (from -r requirements-dev.txt (line 6))
Collecting mock==1.0.1 (from -r requirements-dev.txt (line 7))
Collecting flake8==2.1.0 (from -r requirements-dev.txt (line 10))
Collecting mccabe==0.2.1 (from -r requirements-dev.txt (line 11))
Collecting pep8==1.4.6 (from -r requirements-dev.txt (line 12))
Collecting pyflakes==0.7.3 (from -r requirements-dev.txt (line 13))
Collecting Sphinx==1.2 (from -r requirements-dev.txt (line 16))
  Using cached Sphinx-1.2-py33-none-any.whl
Collecting docutils==0.11 (from -r requirements-dev.txt (line 17))
Collecting Jinja2==2.7.1 (from -r requirements-dev.txt (line 18))
Collecting MarkupSafe==0.18 (from -r requirements-dev.txt (line 19))
Collecting Pygments==1.6 (from -r requirements-dev.txt (line 20))
Collecting Paver==1.2.1 (from -r requirements-dev.txt (line 23))
  Using cached Paver-1.2.1.tar.gz
Could not import setuptools which is required to install from a source distribution.
Traceback (most recent call last):
  File "/Users/stew/.envs/rummage/lib/python3.5/site-packages/pip/req/req_install.py", line 387, in setup_py
    import setuptools  # noqa
  File "/Users/stew/.envs/rummage/lib/python3.5/site-packages/setuptools/__init__.py", line 10, in <module>
    from six.moves import filter, map
ImportError: No module named 'six'

This is fixed by changing the Paver version in requirements-dev.txt from 1.2.1 to the current 1.2.4. It's possible I'm doing something wrong--I'm not clear on why this was happening in the first place--but this change resolves the issue. I'm happy to provide further context if you tell me what info would be helpful.

It looks like the requirements-dev.txt on the master branch is 3 years old--should it be updated? I'll make a pull request so you can update it easily if you think it should be.