Adjusted potion rarities all around, and balancing several potions


Barrett Cola
* Was: 40 damage to target.
* Updated: 10 damage + vulnerable to target.

Girl Tears:
* Was: Select 2 cards from your discard, add them to your hand change their costs to 0 for this turn.
* Updated: Doesn't reduce card cost to 0.

Energy Gas:
* Was: Gain 4 Energy.
* Updated: Gain 2 Energy and draw 2 additional cards next turn.

Clockwork Potion:
* Was: Apply 2 Artifact.
* Updated: Apply 1 Machine Learning (Draw 1 extra card per turn).

Penguin Punch:
*Was: Deal 25 damage to all enemies.
*Updated: Explosion is delayed 2 turns.

Removed Lafferty Potion, due to it not functioning properly, and needing a in depth, complicated fix.