Bugfix: Saving the game as another class no longer crashes the game

Gameplay: Crop Rotation and Photosynthesis now only randomly return in-season crops

* New card: Close Scrape

* Balance: Hot Potato relic rarity moved from common to uncommon

* New card: Rake

* UI Bugfix: Remove erroneous number highlighting on Till the Field

* UI Improvement: Mature crops are now highlighted with a glow effect

* Bugfix: Thresh no longer causes a game crash between acts

* Gameplay: First four unlocks now use predefined seasons (over which all crops are introduced)

* Bugfix: Culling Strike now triggers again from start-of-turn harvest

* UI Bugfix: Fixed typo in Plant keyword description

* Bugfix: Thresh cost is no longer reduced outside of combat

* Gameplay: New uncommon crop added: Coffee

* Balance: Decrease Rototilling draw to 2 cards (3 when upgraded)

* Balance: Increase Fecundity cost from 2 to 3 (2 when upgraded)

* Bugfix: Flaming Spud now deals 5 damage and applies 5 Burning to line up with Spud

* New Card: Thresh

* Bugfix: Culling Strike now no longer triggers if you harvested last turn of the previous combat