updates for grunt 0.4.0
Merge branch 'dev' of https://github.com/marionettejs/backbone.marionette into dev

Conflicts:
	Gruntfile.js
updated for grunt 0.4.0rc7, added plato reports, coverage reports, sourcemaps
added dev task, watch, and separated coverage and basic marionette test
merging in upgrade to grunt v0.4, with code coverage and other analysis reports
upgrade guide and release notes for grunt update