TST Use miniconda in testing

.travis.yml

@@ -2,14 +2,21 @@ language: python
 python:
   - "2.7"
   - "3.3"
-virtualenv:
-    system_site_packages: true
+  - "3.4"
 before_install:
+    - wget http://repo.continuum.io/miniconda/Miniconda-latest-Linux-x86_64.sh -O miniconda.sh
+    - chmod +x miniconda.sh
+    - ./miniconda.sh -b
+    - export PATH=/home/travis/miniconda/bin:$PATH
+    - conda update --yes conda
     - sudo apt-get update -qq
-    - sudo apt-get install -qq python-numpy libatlas-dev liblapack-dev gfortran
-    - pip install numpy --quiet
+    - sudo apt-get install -qq libatlas-dev liblapack-dev
 install:
-    - pip install coveralls
+    - conda create  --yes -n condaenv python=$TRAVIS_PYTHON_VERSION numpy=1.9
+    - conda install --yes -n condaenv scipy matplotlib pillow nose pip
+    - conda install --yes -n condaenv -c https://conda.binstar.org/luispedro imread
+    - source activate condaenv
+    - pip install --quiet coveralls
     - python setup.py build --build-lib=.
 script:
     coverage run --source=milksets setup.py test