added TODO
added {emfjson} and serialised to JSON (~meinte/model.json)
added some FIXME's w.r.t. .load-problems
moved some JavaDoc to the proper place
Revert "added {emfjson} and serialised to JSON (~meinte/model.json)"

This reverts commit 4fd7064be62b302c0fa38ba2b2fb28af1c2dde07.
removed TODO due to improper merge