Introduce New Logging and Refactor

[kergomard]

Hi all

First: I split this into a lot of commits, but they are not really clean as I didn't see another path then to approach this iteratively. I also don't ask anybody for a review, will merge this myself, and take care of the issues arising from this. @dsstrassner and I will do some testing before I merge. Two:

• @alex40724 : There are changes in the question-specific classes of COPage. I see them as minimal, but I still requested a review of these changes. You can find them in this commit.

Now for the beef of the matter: Ok, I've announced this a few times at the TechSquad now here finally is: This PR introduces the new logging implementation for the test. It has gotten really big, but I don't see much of a way around it. So, what does it do:

• It removes the old logging implementation and introduces the new logging itself.
• In order to do this properly I needed to change the way questions are edited. Up to now we relied on redirects, many of them based on URI "assembly". This here removes many of them. I left unrelated redirects (partly) in, to at least manage the size issue partially.
• In order to do this in turn I needed to refactor the questions, partially because it was absolutely necessary, but partially also to understand what I was dealing with. So yes, this lead to quite a few changes, but it lead also to the removal of 2200 Lines, even if looking at the complete set of changes and they also contain a lot of shortening of code lines (ie. introducing line brakes, ie. generating more lines) as well as a hugely more powerful logging system.
• Further I also needed to refactor the whole Marks section and I decided to use this to replace the current table implementation with the new UI-component as well as to introduced a repository pattern, even if the pattern is not perfect yet, in my eyes (there is more potential gain there).

There are a few more not directly changes:

• I moved classes to the src-folder and introduced namespaces.
• As promised in the TechSquad I removed the Services-classes on the global $DIC and moved them to a local dependency container. I created a minimal public interface giving access to the GeneralQuestionProperties (properties shared by all questions) as well as an areQuestionsAnsweredByUser-Function. This is kept small on purpose, as this should still be seen as work in progress, but if I would have started to change things in there even more, this would have gotten completely out of hand.

Best, @kergomard