Infinite Dimensions

• Fixed chaos mobs lacking spawn restrictions and thus spawning in midair.

Merged pull requests by cassiancc and JPeroutek:

• EMI integration for mod's "throw a thing into a portal" recipes;
• fix for a crash with throwing empty books into portals;
• consistensy between unsigned and signed books;
• portals auto-opening when portal key is empty;
• F5 doesn't get rid of dimensional shaders;
• File.separator in use for config generations instead of hardcoded "/".