v0.2.4 - Improved tutorial, rebalanced items.

A small patch done while flying from Spain to Colombia:

• Big improvements in tutorial and tips
• Destroy traps using thrown items and beings
  
• Reduce the number of pots
• Make potions more powerful 
• Increase spawned ammunition items.
• Remove unused class selection on the first game
• Add hint to grab stunned enemies
• Display item tile when thrown