Merge branch 'update-strategy-names' of github.com:Axelrod-Python/axelrod-fortran into update-strategy-names

Author: drvinceknight

.travis.yml

@@ -2,9 +2,11 @@ language: python
 python:
   - 3.5
   - 3.6
+dist: xenial
+sudo: required
+services:
+  - xvfb
 before_install:
-  - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
   - sudo apt-get -qq update
   - sudo apt-get install gfortran
   - git clone https://github.com/Axelrod-Python/TourExec.git /tmp/TourExec