[crossfire] Skill thoughts

[Mark Wedel]

  I've updated:

http://wiki.metalforge.net/doku.php/user:mwedel:skills

I've added a more detailed skill section, going through the skills and combining 
some and adding notes about the others.

I've also added a section on resistances - I'm not sure how I feel about that - 
it add more work, but the counter is it reduces the number of 
attacktypes/resistances from 26 to 11, which in theory means it should be easier 
to balance these (fewer variables).