All the informations you need to use InstantClick are on the link above. This ReadMe’s purpose is about how to use and contribute to a development version of InstantClick.
Tests (in the tests folder) are PHP-generated HTML pages with which to check how InstantClick behaves on different browsers. That’s what I use before releasing a new version to make sure there are no obvious regressions.
To access the suite of tests, run php -S 127.0.0.1:8000 from the tests folder and head to http://127.0.0.1:8000/.
See the Contributing.md file.