Update .travis.yml

Author: Michael Hirsch

.travis.yml

@@ -14,18 +14,18 @@ git:
 
 matrix:
   include:
-    - os: osx
-      env: pyv=2.7
-
-    - os: linux
-      env: pyv=2.7
-      
+     
     - os: osx
       env: pyv=3.5
 
     - os: linux
       env: pyv=3.5
 
+addons:
+    apt:
+      packages:
+        - gfortran
+
 install:
     - if [[ $TRAVIS_OS_NAME == osx ]]; then
         wget http://repo.continuum.io/miniconda/Miniconda-latest-MacOSX-x86_64.sh -O miniconda.sh;