New GraalShop + levelgen + gif2mng + dungeongen

[Admins]

The developer package has been updated. Here the new stuff:

- graalshop (gani editor) can handle the
attributes 10-30 now
- the level generator produces .nw levels
and gmaps
- gif2mng has been updated - the generated mngs
are now compatible to the mng standard,
which is important for Graal v3 which
uses the mng standard;
you can fix old mngs by converting them
with gif2mng again - gif2mng can handle
short to long filename conversion now so
you can convert images by dropping them on
the gif2mng exe in the windows explorer
- there is the new dungeon generator which
has been used to make the dungeons on
Graal Kingdoms. You will need to make your
own inside tiles though to use the
generated levels in your playerworld. There
are dungeongenerators for windows and Linux.