EDDS v1.5 update

EDDS v1.5 Changes

* Recurring characters at inns. potentially controlled by main villain,

  to nudge player toward some goal.

* Generation of random worlds, consisting of mainland,

  islands and even underdark passages. The algorithm is simple,

  compatible with the existing rules, doesn't use square grid or hexes,

  so maps can be compactly drawn on small piece of paper.

  If you want a unique world, or don't have a huge hex map or

  nowhere to unroll it (e.g. on train).

* Overhauled the condition system to use solely d20.

  The condition levels were replaced by condition DC,

  done at the end of the hero phase to discard it.

  That simplifies the system and facilitates skills and items

  giving bonuses to rolls against specific conditions.

* When monster spawns, heroes immediately get its XP.

  That is to promote evading monsters instead of killing them.

* Usual batch of minor fixes.