only `npm install` on package changes
only `npm install` on package changes

also log info message when watcher is reloading for config changes

lalomartins/brunch,Flaise/brunch,rlugojr/brunch,kidaa/brunch,PeterDaveHello/brunch,justinwoo/brunch,ondreian/brunch,hayesgm/brunch,brunch/brunch,hellyeahllc/brunch