fix: install nibabel in python dir

Author: satra

.travis.yml

@@ -6,8 +6,8 @@ before_install:
     - sudo apt-get update -qq
     - sudo apt-get install -qq python-scipy python-nose
     - sudo apt-get install -qq python-networkx python-traits python-setuptools
+    - sudo easy_install nose
     - virtualenv --system-site-packages ~/virtualenv/this
     - source ~/virtualenv/this/bin/activate
-    - easy_install nibabel
 install: python setup.py build_ext --inplace
 script: make test