.clang-format file needed

[jpc0]

Could we see if we can get some standardisation on a .clang-format file.

[efecan0]

Hi!
I've just added a .clang-format file to the project for code style standardization.

It's currently based on the LLVM style with 4-space indentation and a 100 character column limit, but feel free to suggest any tweaks!

[efecan0]

here pull request