Try numpy 1.7.1 to work around the useless numpy output

.travis.yml

@@ -24,7 +24,7 @@ before_install:
   - conda update --yes conda
 
 install:
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then conda create --yes -q -n pyenv mkl python=2.6 numpy=1.7.0 scipy=0.11 nose=1.3.0 pyparsing=1.5 pip flake8==2.3 six==1.9.0 pep8==1.6.2 pyflakes==0.8.1; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then conda create --yes -q -n pyenv mkl python=2.6 numpy=1.7.1 scipy=0.11 nose=1.3.0 pyparsing=1.5 pip flake8==2.3 six==1.9.0 pep8==1.6.2 pyflakes==0.8.1; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '3.3' ]]; then conda create --yes -q -n pyenv mkl python=3.3 numpy=1.9.1 scipy=0.14.0 nose=1.3.4 pyparsing=1.5 pip flake8==2.3 six==1.9.0 pep8==1.6.2 pyflakes==0.8.1; fi
   - source activate pyenv
   - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install pydot; fi