Gruntfile watch CPU & notification fixes - Stop express server from livereloading (causing it to watch entire build/package folder, causing ~70% OS X CPU usage) - Increase polling interval for watching (100ms after express server fix still contributed ~75% OS X CPU usage) - Add friendly notifications for post-watch tasks and post-browserify builds.
Gruntfile watch CPU & notification fixes
- Stop express server from livereloading (causing it to watch entire build/package folder, causing ~70% OS X CPU usage)
- Increase polling interval for watching (100ms after express server fix still contributed ~75% OS X CPU usage)
- Add friendly notifications for post-watch tasks and post-browserify builds.

dillia23/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org