language: python
python:
  - "3.3"
  - "2.7"
  - "2.6"
install:
  - "pip install numpy scipy"
script: nosetests 

language: python
python:
  - "3.3"
  - "2.7"
  - "2.6"
virtualenv:
  system_site_packages: true
before_install:
  - sudo apt-get install -qq python-numpy python-scipy python-sympy
script: nosetests 

Install dependencies using apt instead of pip
Travis: Install dependencies using apt instead of pip
