From commit log.
* completely remove rubycocoa backend, as it hasn't worked correctly
since 10.6 and rb-fsevent is a better solution regardless
* mention guard/listen on require
ruby-compass pacakge.
The File System State Monitor keeps track of the state of any number
of paths and will fire events when said state changes
(create/update/delete). FSSM supports using FSEvents on MacOS, Inotify
on GNU/Linux, and polling anywhere else.