v0.12.0 - added mining workbench

New version of Skilllwood has been released. 

Changelog:

• Added upgradable mining workbench
  • 0 level
    
  • 1 level
    
    
• Added pickaxe hit animation (after first upgrade of mining workbench)
• Updated music: recreated soundtrack from Bosca Coil with poor samples on Fruity Loops with better samples
• Bugfix: show skill requirements only if skill workbench can be upgraded
• Bugfix: fixed loading bar