Updates travis to single install step

  - source activate test

  # Install dependencies

  - conda config --add channels menpo

  - conda config --add channels usgs-astrogeology

  - conda config --add channels conda-forge

  - conda config --set ssl_verify false

  - conda install -c usgs-astrogeology plio

  - conda install -c conda-forge vlfeat scipy networkx numexpr cython matplotlib pillow runipy geopandas opencv numpy libgdal gdal scikit-image pytest pytest-cov coverage anaconda-client coveralls

  - conda install -c menpo cyvlfeat

  - conda install -c conda-forge vlfeat scipy networkx numexpr cython matplotlib pillow runipy geopandas opencv numpy libgdal gdal scikit-image pytest pytest-cov coverage anaconda-client coveralls plio cyvlfeat

script:

  - pytest autocnet tests