Cython==0.20.1
Jinja2==2.7.2
MarkupSafe==0.23
Pygments==1.6
Sphinx==1.2.2
argparse==1.2.1
docopt==0.6.1
docutils==0.11
matplotlib==1.3.1
numpy==1.8.0
pandas==0.13.0
py==1.4.20
pyparsing==2.0.2
pytest==2.5.2
python-dateutil==2.2
pytz==2014.2
schema==0.3.1
scipy==0.13.3
seaborn==0.3.1
six==1.6.1

Cython==0.20.1
Jinja2==2.7.2
MarkupSafe==0.23
Pygments==1.6
Sphinx==1.2.2
argparse==1.2.1
docopt==0.6.1
docutils==0.11
matplotlib==1.4.1
numpy==1.9.0
pandas==0.13.0
py==1.4.20
pyparsing==2.0.2
pytest==2.5.2
python-dateutil==2.2
pytz==2014.2
schema==0.3.1
scipy==0.13.3
seaborn==0.3.1
six==1.6.1

Upgrade to latest versions of matplotlib and numpy
Upgrade to latest versions of matplotlib and numpy

This seems to fix the build error seen when running

pip install -r requirements.txt

and hopefully will fix the intermittent TravisCI errors too.
