v0.0.7 changes

Hey fellow blacksmith! I'm here with a new content update!

     - Added a new floor to the cave with 2 new minerals.

     - Added a new part of the story with the first building of Aventis town.

     - Added a new quest system: villagers requests.

     - Added a new secret.

Since the game content starts to be important the next update will be a small visual upgrade for the equipments you can create making it more appealing.