- add graphviz so new FORD will work.

Author: jacobwilliams

.travis.yml

@@ -11,6 +11,7 @@ before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq python-numpy python-scipy
   - sudo apt-get install gfortran-4.9
+  - sudo apt-get install graphviz
   - sudo ln -fs /usr/bin/gfortran-4.9 /usr/bin/gfortran && gfortran --version
   - sudo -H pip install FoBiS.py && FoBiS.py --version
   - sudo -H pip install ford && ford --version