Write JavaScript formulas

[BaReinhard]

Write JavaScript functions/formulas for existing mathematics formulas to be used with the mathematics API being created.

[adityatandon007]

@BaReinhard I would like to take this.

[BaReinhard]

take as many as you want, it would be extremely helpful. Still deciding how to implement the API fully, but so far things are working well and the only downside is that we require more javascript functions since the API is being written in node

also, thank you all for the help!

[adityatandon007]

@BaReinhard added some more commits, could you have a look at my PR #244 . It would be great if you could merge it so that I and other can be in sync of what else are required to be added.
One more thing there are many files in which areas of a particular shape is repeated. I think you could create an issue for cleaning up duplicates in repository code. Would love to help.

[Hum4n01d]

I'll write one :)

[rnagella]

Added add formula - #427

[Mastermind63]

add the formula for calculating the solids of constant width based on three sides of a triangle