only adding deployment watcher if the dir exists
setting content type of requests handled by the BRJS servlet based on what the appserver supplies as the correct mime type, also changing the mime type for JS to application/javascript - fixes #307
adding NodeCreatedEvent

node created event will now be fired when any node is created.
this should allow @leggetter to write a model observer plugin to create
a readme on app.create
Merge branch 'bundler-exploration' into jstdnewbundlersupport