Create tutorial on BDD

This MR adds a tutorial about creating a basic BDD test suite.

Close #10 (closed).

README.md

@@ -336,6 +336,12 @@ To see the test report generated by the test runner,
 open the HTML document located at [`./target/site/serenity/index.html`](./target/site/serenity/index.html).
 The report will show information such as the total number of features and their test status.
 
+> Note: To see how the test suites are configured and run by Maven build system,
+> you can peruse the build configuration at [`pom.xml`](./pom.xml).
+> The configuration utilises several plugins such as Surefire and Failsafe to run the test runners.
+> In addition, to ensure the BDD test suite can be run independently,
+> the configuration use a custom Maven profile to isolate the BDD test suite from the other test suites.
+
 ## Tasks
 
 Your tasks are to write new test scenarios for two existing features that yet to be covered by the BDD test suite.