Etherium

The Changelog:

[Release 1.18.2-v1.4.0]:

 - Fixed crash on game startup;
 - Implemented etherium block, nugget and scrap;
 - Etherium tools now have harvest level above diamond.

[Release 1.18.2-v1.3.1]:

 - Etherium Shovel is now efficient against clay.

[Release 1.18.2-v1.3.0]:

 - Initial 1.18.2 port.

[Release 1.18.1-v1.2.0]:

 - Initial 1.18 port.

[Release 1.17.1-v1.1.0]:

 - Initial 1.17 port.

[Release 1.16.5-v1.0.1]:

 - Fixed repair material specification;
 - Fixed AOE interaction with Astral Sorcery's marble/wood, and spawners when Apothesis is installed (#211).

[Release 1.16.5-v1.0.0]:

 - Initial release.