Cards, ghost skin, essence works as intended now

New features :

• Ability to save and load different decks
• Ghost/Knight skin

New cards :

• Crystal Hunter
• Crystal Guardian
• Entombed Husk

Balancing :

• Shardmite now occupies lane
• Sharp shell now has the shielded
• Nests do not lose the hatchling when the placement is canceled
• The brooding now only considers cards in the same lane

Opponents :

• Willoh will only place a rolling baldur if the benefit equals the cost
• Willoh can use Oomas to protect an empty lane
• If two cards cost the same, Willoh will priorities killing the one with higher stats

Fixes :

• When paying multiple essence, following cards not being forgotten
  
• Nests' descriptions update with the amount of hatchlings left
• Match result screen staying on when forced to quit by another player disconnecting
• The advanced manual crashing for cards that cost more than 4 essence
• The host always going first
• General optimization