New Changes Logbook added

In order to make it easier for users (and myself) to keep track of what changes are being made and also to trace changes to individual drawings or subjects, I have decided to add this “Blog-like” listing with TAGS and Categories. I will also try to add links to the respective pages affected, and hope it will increase the user friendliness for the visitors.

Note however that the links of older entries (viewed with respect from later in the future) may break as I move pages around or reformat the various groupings...