Move some content from Roger's website

[giordano]

@Roger-luo has some resource about the use of Julia for general Physics:

• https://github.com/Roger-luo/TutorialForPhysicists.jl
• https://github.com/QuantumBFS/JuliaChallenge/blob/master/ToolChain.md

That may be a good idea to move some content, not specific to Quantum Physics, to the website.

CC: @GiggleLiu

[giordano]

Related, @kshyatt has some other Physics tutorials that can be listed in the website: https://github.com/kshyatt/juliacon2017

[carstenbauer]

Note that I created JuliaPhysics/PhysicsTutorials to collect physics related tutorials/instructive showcases to be linked on the JuliaPhysics website. Would be great if we could move existing stuff there! @kshyatt @Roger-luo

[Roger-luo]

cool, can I join the org as well?

[giordano]

I should have sent you an invitation, did you get it?

[GiggleLiu]

@giordano Could you please write a guide in README about how to contribute to this project?
If the workflow is clear, people can add contents by submitting PRs.