Blinded with Science

Pre-GCSE science teachers rejoice - we've just added new sets for you, along with some new History sets at KS2 and KS4.

Also fixed in this update:

Entire Billionaire building-buying code rewritten, hopefully squashing some reported issues.
Fixed a bug that was causing wrong answers to display incorrectly on the Billionaire tutorial level.
Fixed a bug that was causing Conspiracy to crash if a student overkilled themselves with incorrect answers.
Ionia Accent buttons redesigned.
Ionia Multiple Choice buttons redesigned.
Improved the animation moving Ionia correct answers to the player.