fix for path resolution on Windows
remove empty line in the end
add new line in the end
minor change
Frame identifier delimiter is a null char

This is disallowed in paths on both *nix and Windows.
os.sep is the platform-independent path separator
use os.sep and add comments
Merge remote-tracking branch 'codelol/path' into path

Conflicts:
	pyinstrument/profiler.py
Merge branch 'path' into develop