Slide rule branch

[LorrMaster]

• New item: the slide rule
• Use it to complete a large number of mathematical calculations
• Add, subtract, multiply, divide, exponents, roots, trigonometry, logs
• Saves your past 5 previous calculations
• Can type in Ans, Pi, E as variables to use constants or previous answers
• Emag the slide rule for a couple other silly things
• Don't divide by zero

Video: https://www.youtube.com/watch?v=PktlGG7W0kc&t=2s