Spice of Overhaul

Added:

Huge balance changes to exhaustion and natural regeneration:

now both exhaustion and regeneration depend on current hunger and saturation level and regeneration also depends on difficulty level and current health.

Well Fed effect which increases natural regeneration rate.

Finally implemented gui (you can disable it in config if necessary).

Implemented food stats eating speed dependency on eating speed.

Fixed health regeneration estimation of AppleSkin.