OO296: implemented methods to add text or upload file artefact and create learning journal. Additional utility methods had implemented as well.

renamed FunctionalResourcesSite to FunctionalRepositorySiteUtil and therein renamed some fields and methods, too.
Began to implement FunctionalArtefactTest.
Some Bugfixes.

The work on FunctionalResumeTest hasn't finished, yet.

created FunctionalResumeTest class and some utility methods