Use apt-get to install requirements.

Author: pnuu

.travis.yml

@@ -4,9 +4,13 @@ python:
   - '2.7'
   - '3.2'
   - '3.3'
+  - '3.4'
+virtualenv:
+  system_site_packages: true
+before_install:
+  - sudo apt-get update -qq
+  - sudo apt-get install -qq python-numpy python-matplotlib python-pythonmagick
 install:
   - pip install .
-  - pip install numpy
-  - pip install matplotlib
-  - pip install pythonmagick
 script: nosetests
+cache: apt