Fixing Qiita installation (#2362)

Author: josenavas

.travis.yml

@@ -28,7 +28,7 @@ install:
   # install a few of the dependencies that pip would otherwise try to install
   # when intalling scikit-bio
   - travis_retry conda create --yes -n qiita python=$PYTHON_VERSION pip nose flake8
-    pyzmq networkx pyparsing natsort mock future libgfortran seaborn nltk
+    pyzmq 'networkx<2.0' pyparsing natsort mock future libgfortran seaborn nltk
     'pandas>=0.18' 'matplotlib>=1.1.0' 'scipy>0.13.0' 'numpy>=1.7' 'h5py>=2.3.1'
   - source activate qiita
   - pip install -U pip

setup.py

@@ -107,7 +107,7 @@
                         'bcrypt', 'pandas >= 0.17', 'numpy >= 1.7',
                         'tornado==3.1.1', 'toredis', 'redis', 'six',
                         'pyparsing', 'h5py >= 2.3.1', 'biom-format',
-                        'natsort', 'networkx',
+                        'natsort', 'networkx < 2.0',
                         'scikit-bio == 0.4.2', 'wtforms == 2.0.1',
                         'sphinx-bootstrap-theme', 'Sphinx >= 1.2.2',
                         'gitpython', 'qiita-files', 'redbiom==0.1.0-dev'],