Feature ideas

[alexbarry]

Some things that I think would be easy enough to implement if there is interest:

• output formatting: number of decimal places, commas or other delimiters for thousands (or tens of thousands, which I think some places use). Also showing engineering notation (output in form of x * 10^(3*n) instead of x * 10^n) (I meant to include some output formatting before releasing it, but I wanted to try sharing it first to see if there was any interest)
• defining functions (similar to how variables are defined)
• graphing those functions
• simple equation solving (this might be a lot harder, but I could probably implement some simple methods)
• UI customizations (different colour themes, configurable buttons)
• horizontal layout
• unit output preferences (e.g. prefer imperial for distance, show astronomical units or parsecs if greater than 10^16 metres or something like that)