align circleci/travis builds

Author: Shoshana Berleant

.travis.yml

@@ -55,8 +55,7 @@ install:
   pip install https://github.com/dmsurti/mayavi/archive/4d4aaf315a29d6a86707dd95149e27d9ed2225bf.zip;
   pip install -e git+https://github.com/enthought/ets.git#egg=ets;
   fi
-- pip install -r requirements.txt  # finish remaining requirements
-- python setup.py install
+- pip install -e .
 script:
 - python -W once:FSL:UserWarning:nipype `which nosetests` --with-doctest --with-cov --cover-package nipype --cov-config .coveragerc --logging-level=DEBUG --verbosity=3
 after_success: