4.0.1 release

[iteman]

• [x] Create a branch for the release if it does not exist
• [x] Update the branch of the build status in README.md if the branch is newly created (4.0)
• [x] Update README.md and src/CLI/TestRunnerApplication/Application.php on the release branch. (4.0)
• [x] Tag to the release on git with the command git tag -s v4.0.1 HEAD (4.0)
• [x] Push changes to GitHub with the command git push upstream 4.0 and git push upstream --tags (4.0)
• [x] Create a new draft release as Stagehand_TestRunner 4.0.1 (stable) (GitHub)
• [x] Write the description of the release
• [x] Publish the release
• [x] Update wiki pages (Home and Contributors)
• [x] Update the version of src/CLI/TestRunnerApplication/Application.php from 4.0.1 to 4.0.2 (4.0)
• [x] Merge v4.0.1 into master with the command git merge v4.0.1 (master)
• [x] Push changes to GitHub with the command git push upstream master (master)
• [x] Tweet the release