For those not familiar with the background who want to help:

What was done:

• Support was achieved for both Linux and OS X.
• Windows native support (windows implementation #4) may be worked on.
• The polling backend requires the ability to get the mtime of a file, which cannot currently be done in stable Rust, so it was dropped.

What is needed:

• To get a replacement for stat.modified().
• To implement anew (or adapt from the old code) a polling backend.