Improve documentation in terms of javadoc and website as well. Where feasible introduce minor code changes for better readability.

The tutorial suggests editing the cabal file to add dependencies for use with stack. My understanding is that the dependencies are to be added in the package.yaml file and not the cabal file for use with stack. Is this what was intended? I just confused a newcomer with contradictory advice to the contents of the tutorial.

Ref: https://docs.haskellstack.org/en/stable/GUIDE/#files-in-helloworld

Pom.xml configured via documentation https://docs.qameta.io/allure/#_maven_3.
When I run test via "mvn test" all works fine.

But I would build jar of test project then extract it on slaves and run tests via command "java org.testng.TestNG suite.xml"

Current result

Test report generates but test body is missed.
![image](https://user-images.githubusercontent.com/44173756/49470112-35c8f

Trace 'ava' import to find test declaration, then find its t parameter