Alpha 0.0.3 - DNA refinement

Additions

• new traits: enzyme (energy-recover per turn), energy-store (bonus to max energy capacity)
• right side bar for better DNA visualisation
• random mutations, every object now has an attribute stability indicating the per-turn chance of mutation occurring in its DNA

Changes

• changed previous DNA bars in bottom panel to hp and energy display
• slight adjustments to walkable terrain color and icons to blend better when outside FOV

Removed

Fixes

• 100% CPU use from too frequent input queries

Known issues

• Attacking actions are in the game but don't do anything yet