Stuff for the Biogenerator

1. Added an option to dispense 50 milk and 50 cream and 5 monkey cubes, since it is relatively annoying for botanists to make small amounts upon small amounts. So now it gives a x5 button.

2. The Ez-nutrient, and the other 2, always only made 3 of it instead of 5 when you used the x5 button. That has been fixed.

3. Added Plant-B-Gone and Pest Spray to the biogenerator. Note, these are only their chemicals and come in 50 unit bottles.

4. Now also able to create carpet floortiles in stacks of 1, 10, 30, and 50.

I tested everything locally, and everything works as intended.
Also, reduce the cost per tile by 3 or so.