adjusted travis configuration (without netcdflib)

- removed netCDF4 and dependencies from travis configuration
- fix scipy.io import problem relating to libgfortran Travis CI problem
  described in Issue MDAnalysis/GridDataFormats#17.

.travis.yml

@@ -6,8 +6,7 @@ addons:
   apt:
     packages:
       - gfortran
-      - libhdf5-serial-dev
-      - libnetcdf-dev
+      - libgfortran3
       - liblapack-dev
       - libatlas-dev
 before_install:
@@ -17,9 +16,9 @@ before_install:
   - export PATH=/home/travis/miniconda/bin:$PATH
   - conda update --yes conda
 install:
-  - conda create --yes -q -n pyenv mkl python=2.7 numpy=1.9.1 scipy=0.14.0 nose=1.3.7 sphinx=1.3
+  - conda create --yes -q -n pyenv python=2.7 numpy=1.9.2 scipy=0.16.0 nose=1.3.7 sphinx=1.3
   - source activate pyenv
-  - conda install --yes python=$TRAVIS_PYTHON_VERSION cython biopython matplotlib networkx netcdf4
+  - conda install --yes python=$TRAVIS_PYTHON_VERSION cython biopython matplotlib networkx
   - pip install package/
   - pip install testsuite/
   - pip install coveralls tempdir
@@ -49,4 +48,4 @@ env:
       - GH_REPOSITORY: github.com/MDAnalysis/mdanalysis.git
       - GIT_CI_USER: TravisCI
       - GIT_CI_EMAIL: [email protected]
-      - MDA_DOCDIR: package/doc/html
+      - MDA_DOCDIR: package/doc/html