Wheels for Mac OS and Windows

[shwina]

Currently, we only publish wheels for Linux/x86 on PyPI: https://pypi.org/project/nvtx/#files. On any other OS/arch, pip installs fall back to source builds, which are problematic because users need to configure their compilers to find the NVTX C headers. This is often a pain point, as evidenced by issues like #80.

We should provide pre-built wheels for other OS/arch.

[Meerkov]

Yes please, you're a $3 trillion company, can we have windows support :)

[evanramos-nvidia]

Implemented on the dev branch in commit 5ed4270