language: ruby
before_install:
- sudo apt-get update -qq
- sudo apt-get install -qq libgsl0ldbl libgsl0-dev
rvm:
- 2.1.3
script: 
- bundle exec jekyll build
- bundle exec htmlproof ./_site
notifications:
  slack:
    secure: Gq8bPNJaQ2HHJfnMQ5rK8QOh3Ww44wvhr+WzEKjBbnC5piRn7TLWDy95ED75a42vcxgX6eDnofV24wci2/IQ1p8rmGJNxpkPTN9SaFcc5GNT3RzdFTZPr744N7VvUS8aFZiNm4hcsdNlYRBd7fom6SA59ykkdaO5/4u2O0+dvkg=
env:
  global:
    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer