Fix infinite loop on JS build watcher
Fix infinite loop on JS build watcher

All CoffeeScript files within the `src/js/` directory now require
the extension `.coffee`; no JavaScript files are compiled with
`gulp build-js` anymore -- there is only `gulp build-coffee`, which
builds only files matching the following pattern: `./src/js/*.coffee`.

hinsley-it/maestro,hinsley-it/maestro