Power-ups, Trading Cards and Bug Fixes

[Added]

• Steam trading cards
• 8 Power-ups:

• Defense - Adds 5 points to defense of warriors and witches
• Exhauster - Will cooldown 1 card of each player
• Heal - Adds 5 points to hero's life
• Hitman - Adds 5 hit points to each of your card, except witches
• Instant move - Allows you to do instant attack - you need to have attacking card on the turn position.
• Rage - Does a rage-attack on all of your opponents - you need to have attacking card on the turn position
• Reveal - Shows all opponents turn cards
• Stamina - Adds 5 points to hero's stamina

[Bug Fixes]

• Fixed multiplayer/singleplayer bugs of particles and card order
• Fixed cards' defence values