Sims 4 - Fin Des Temps

Adds a chemistry system to the game

Enables BuildBuy on Secret Lab for new saves.

Overhaul of the way writing books works and the Writing Career including both the Author and Journalism branches. They are now semi-active careers with over 40 possible assignments. All options are available under the phone (Social or Work menus) or computer (Writing, Web Research, or Socialize menus)