Make player attributes writable by lua.

No good reason not to do it, really. Also makes cheating easier.
added comma.
Selecting a world on new character generation now shows the nr of chars in that world.
add new type to extractor
pot file update
Merge pull request #6174 from Soyweiser/typo_computer

Text fix, as reminded by bugsniper.
Merge pull request #6150 from CIB/attributes_writable

Make player attributes writable by lua.
Merge pull request #6179 from VlasovVitaly/fix-pot-file

Fix pot file
Merge pull request #6176 from Soyweiser/World_Nr

Character # on new character world selection.