toaster update

toaster mode engaged!

This update adds a performance mode in which the runtime neural network is turned off and all images are pre-generated assets. In toaster mode you have no ability to customize your own portraits, but the game should run even on really shite hardware. Or at least it will once I iron out some unity issues.

As a part of this update I changed significant parts code for spawning/despawning cards, this can potentially lead to bugs such as unplayable cards or cards without displayed cost. I hope I caught them all before the upload, but if you run into any - all reports are appreciated.