changes needed for the new GeoNode integration: add the new GeoNode plugins, add the dependencies, and update gxp
Merge branch 'integration'

Conflicts:
	webapp/src/gxp/script/plugins/FeatureEditor.js
	webapp/src/gxp/script/plugins/VersionedEditor.js
Merge commit '3868b39dee2cbdac3099ad84ba4e2537798a24af'

Conflicts:
	webapp/src/app/app.js