bdata update: Skill window translation.

Updated the bdata.grf file. This one corrects the skill window information so you can actually see the skill descriptions in english. It also makes the basic skills (Potion Pitcher, Resurrection, & Repair) show up in the extended skill-list view.

It is not perfect, however, as this grf still shows some problems for Super Novice classes, and the skill description is too long for many skills. So this will be updated again at some point in the future.