Pharmacist and Psychotherapist rules update

Did update to some card text where we switched the Pharmacist and Psychotherapist core mechanics so that Pharmacist is more focused on add/remove instead of change chemical types.

A little more variety in card art.

The version here on Itch.io is now ahead of what we pulled together for Global Game Jam 2020,
The game jam version will remain as was released here https://globalgamejam.org/2020/games/fix-brain-feel-better-8