Fight the copper under the earth (0.21)

Hello,

this update bring the beginning of the earth element.

• When you build a shrine, you can try to evolve to this new element.
• Tools and trading back, also for light and shadow.
• With the earth you can mine copper and create tools from it, (7 Buildings in total).
• This feature also allow to interact with nearby fields, e.g. for terraforming or fighting.
• The options have also been revised, for example all keys can be changed.
• Also with this feature the whole database is transform, so you can easily mod every data in the game
• and fixed a lot of bugs. ;)

In the next version the earth element will be more build up, so you can also mine iron and gold and also some ui improvements will be included.

Greetings Sven