Fixes config bugs leading to item and entity id conflicts

Moves KnowledgeBook id to avoid conflict with item from moon config.

Initializes idEntityEvolvedSkeleton so it does not try to register entity id 0.

Fixes https://github.com/micdoodle8/Galacticraft/issues/27 and https://github.com/micdoodle8/Galacticraft/issues/28