Profiler not correctly filtering files on Windows

[Oisota]

The profiler is not filtering out non-project code when running on Windows. The culprit seems to be these lines in the is_project_func method. The forward slashes in the paths will never be in the path when on windows and all non project code gets included in the profile.

I was able to fix the issue locally by simply removing the forward slashes from the two paths. If this is an acceptable fix, I'd be happy to submit a PR.

[tim-schilling]

Hmm, there's probably a better way to inspect the filepath. I think we'd want to check that these are directories in the filepath and not simply check for the directory name in the filepath. A PR is definitely welcome!

[praffq]

This is my first pull request , any advises would be greatly appreciated.