Update .travis.yml

.travis.yml

@@ -16,15 +16,14 @@ jobs:
       before_install:
         - brew update
         - brew install open-mpi
-        - sudo easy_install pip
 
 # command to install dependencies
 install:
-    - pip install codecov
-    - pip install python-coveralls
-    - pip install coverage==4.5.4
-    - pip install -r requirements.txt
-    - pip install .
+    - pip install --user codecov
+    - pip install --user python-coveralls
+    - pip install --user coverage==4.5.4
+    - pip install --user -r requirements.txt
+    - pip install --user .
 # command to run tests
 script:
     - nosetests --with-coverage