Update readme to specify BSD / OSX limits.
Update readme to specify BSD / OSX limits.

fsnotify/fsnotify,justintung/fsnotify,masahide/fsnotify,jsix/fsnotify,omeid/fsnotify,scalingdata/fsnotify-v1,streamrail/fsnotify,opsmatic/fsnotify,mingshun/fsnotify,treejames/fsnotify,springning/fsnotify,beni55/fsnotify-1,wheelcomplex/fsnotify,qida/fsnotify,beni55/fsnotify,fsnotify/fsnotify,fsnotify/fsnotify,FactomProject/fsnotify,howeyc/fsnotify