Set up integration test environment
Add initial integration tests
Add TravisCI configuration file

The Chrome installation script comes from the discussion on the TravisCI
issue tracker, "Chromium/Chrome does not work in an OpenVZ container"
(gh-938):

https://github.com/travis-ci/travis-ci/issues/938
Move selectors to declarative JSON file
Automate selector object creation
Create (and use) an "application driver" class