watcher: more useful usage message.
watcher: more useful usage message.

glawler/watcher-visualization,glawler/watcher-visualization,glawler/watcher-visualization,akbardotinfo/watcher-visualization,akbardotinfo/watcher-visualization,glawler/watcher-visualization,akbardotinfo/watcher-visualization,glawler/watcher-visualization,akbardotinfo/watcher-visualization,akbardotinfo/watcher-visualization