Patch v9.21

* Added extra 'reintroduce' menu item for both plants and animals
* In the greenhouse level, there are extra help messages to nudge the player in the right direction
* Sound settings are now saved in between play sessions
* 75% speedup of the system that makes animals animatable, decreasing load times and increasing FPS
* The system that makes animals animatable now only needs 2% of the memory it used before
* 90% speedup of the system that specializes generic animations onto a specific animal, decreasing load times and increasing FPS
* Fixed flying animals sitting still in the air just before dying
* Prevented eat and idle animations in the air
* Fixed objective list view showing the 'not met' icon while actual number was even higher than the minimum required in the greenhouse and disaster level
* Fixed mouths facing the wrong way during the cry animation
* Fixed the proto beak facing the wrong way during all animations
* Fixed mutated animals sometimes having incorrect statistics and abilities
* Fixed animals climbing in growing trees and growing themselves along with the tree
* Fixed organisms being visualized at the wrong side of the river for the disaster level
* Lock camera rotation after clicking the 'roots' button in the plant editor, preventing weird camera glitches