Improve readme.

[inderpreetsingh]

The current readme is arguable off-putting to new contributors. We need to do a better job at making the first impression.

[inderpreetsingh]

Some advices on internet about making a good readme
https://www.makeareadme.com
https://gist.github.com/PurpleBooth/109311bb0361f32d87a2

https://github.com/noffle/art-of-readme

[inderpreetsingh]

List of awesome readmes

https://github.com/matiassingers/awesome-readme

[quentinpaden]

I think I have a really awesome way to improve the readme through lightweight gif formatted recordings embbedded into the documentation.

Where is the best place to talk about future additions? @inderpreetsingh

[brlcad]

@Max2020q For something like the readme, it's probably best to just submit a pull request with your new and improved version and it can be discussed on the pull request. Otherwise, our Zulip chat is a good place to discuss: https://brlcad.zulipchat.com