Update EA-1.18 : Better Humans!

New models for Humans (Tribal, Romans, Medieval, Egyptian, Asian and Vikings)
- New models for Priest and Heretics.
- The Karma is no longer affecting the radius of miracles. This was disturbing for many players.
- New Music System that should fix the bug of sound stopping when the world become too large.
- Balance mana gain to avoid mana to be gained or drop too quickly
- Fixed a bug preventing the player to grab miracles on some circumstances
- Fix Tornado mana cost
- Fix Human Info displayer should now face the player properly

And as usual various small optimizations.