There are serveral kind of documentation available:

If you are new to PatternTesting this is the place where you should begin. You'll find here a short introduction and other information round about PatternTesting.
A simple hello-world example (based on PatternTesting 0.6) you can find on Oli's blog. For more examples look at PatternTesting-Samples.
For each subproject you'll find a documentation section with the the Java docs.
Project Documentation
For each subproject you find information about the project (like the dependencies to other libraries) and reports (like the JUnit test result).