create .gitattributes to handle EOL

[mle2718]

If team members are developing in *nix, windows, and mac, line endings can be a problem.

Two possible fixes are:

1. edit every user's users git-config https://stackoverflow.com/questions/2825428/why-should-i-use-core-autocrlf-true-in-git, or
2. Handle in the repository by setting everything in the repo to LF, while allowing the Windows users to use CRLF when developing locally,

further reading:
https://www.aleksandrhovhannisyan.com/blog/crlf-vs-lf-normalizing-line-endings-in-git/

[mle2718]

@DChevrier1 --what do you think about this?