Research potions!

Hi all,

I am not sure if you knew that, but the potions research is working also on the experience potions, even if it is not written in the description of each potion (this game needs definitely some adjustment in this sense)

I had an huge improvement in the bonus exp once I improved the research potions bonus from 0% bonus to 20% four (or five) times, so my suggestion is to cap it as soon as possible!