Bug Fixes
* When syncing, correctly use POSIX destination paths instead of matching host (Fixes 78)
* Improved path resolving when executing `belay` commands in subdirectories of a Belay project.
New Features
* Additional functionality to: `belay run`. If the specified port is actually an `executable`, executes it after setting `MICROPYPATH` to cached project dependencies. Intended to be used as `belay run micropython my_script.py`.