EDDS v1.6 update

EDDS v1.6 Changes

* Playing an evil chromatic dragon, growing from a wyrmling to and an adult,

  together with lair, hatchlings and appropriate goals to become FULFILED.

* Halfling and goblin races.

* Clarified surge tokens mechanics: you replenish them to 2 each day.

  A rule allowing spending PREPATED to gain 1 surge token.

* 4 pregenerated heroes for quick start.

  I found that even the simple 5-roll EDDS hero generation is boring and

  confusing for many people, who just want ingame ASAP.

* Simplified the needlessly complex Escalating Difficulty rules.

* Numerous rules improvements and grammar fixes.