Like with most scala projects, this tool is shipped with a build.xml file. Use apache's ant utility to compile this. The build produces a zip file ara-development.zip, that contains all the necessary jar files. Personally I don't like that so you should unzip this file.
$> ant
$> unzip -d build ara-development.zip
The tool can be run with
$>java -jar ara.jar <tool> <tool options>
More details about the unique-markers tool can be found by:
$>java -jar build/ara.jar unique-markers
After building, you can run the examples and tests in the testing/
directory