Support watching single files #16
Description
Currently the FSEvents backend supports watching single files, the inotify backend doesn't.
Go's fsnotify, Ruby's Listen, Facebook's Watchman and others also do not support watching single files.
Phase 0 of this feature is research:
- What is the reason behind lack of support in others?
- What are libraries that do have support?
- What are challenges for an implementation?
- Is this doable in a backend-independent manner?
If that last point can be answered by yes, another question is whether this behaviour would be better done in a separate package.