Merge pull request #118 from alimanfoo/pip-freeze-alimanfoo-20181108

Move pip freeze

Author: jakirkham

.travis.yml

@@ -23,7 +23,6 @@ matrix:
 install:
   - pip install -U tox-travis coveralls pip setuptools wheel
   - python setup.py build_ext --inplace
-  - pip freeze
 
 script:
   - tox

tox.ini

@@ -18,6 +18,7 @@ commands =
     py37: pytest -v --cov=numcodecs --doctest-modules --doctest-glob=*.pyx numcodecs
     coverage report -m
     py37: flake8 --max-line-length=100 numcodecs
+    pip freeze
 deps =
     py27: backports.lzma
     -rrequirements_dev.txt