LightningCraft

> Nearly completely rewritten for 1.8+
> Needs Java 8
> Code optimized and cleaned up
> Machinery progression has been tweaked
> Improved Underworld structure entity spawning
> Underworld portal is now valid from 2x2 to the max Nether portal size
> Improved achievements
> Tweaked all recipes to reflect new balance
> Electricium can now be made by striking iron, gold, and diamonds on the
ground with lightning
> Lightning now has a higher chance to strike a cell-terminal setup
+ Added Lightning Crusher
+ Added new infusion recipes
+ Added JEI integration for infusion and crusher recipes
+ Added Underwood slabs and stairs
+ Added decorative light block
+ Added Underworld emerald ore
+ Added Blazing and Glacial special swords
+ Added Mystic tools and armor
- Removed Arcadia
- Special tool functions (autosmelt, quick farm) not yet implemented
- Temporarily removed user-friendly cannon as it was quite glitchy