Current state of development.
I still want to examine it on a dual-monitor system to see if the mark-up is right, but the pages are finished.
Also I want to check the links when everything is finished.
I finished the JDO part of the documentation.
Some links have to be changed after other parts of the documentation will be finished.
Added status in comments.
Committed patch as is. Having said that there are still some links in that pages that do not work as they point to other, missing parts of docs. They need to be fixed with next chapter.