[rename] Move SerenityListeners and create deprecated ThucydidesListeners
[rename] Create Serenity namespaced class, deprecate Thucydides version and delegate functions
[rename] Create Serenity namespaced class and move some associated test classes
[migrate] Move SessionMap
[migrate] Move exceptions
Merge pull request #5 from mikezx6r/master

More migration to the Serenity namespace