delegate to resource base post save the contactroles creation and management
don't save again the layer after pc and ac change in metadata.
remove paginate.js from layer detail
restructure the GeoNode-GeoExplorer.js file so that it is easier to use an SDK application in GeoNode, a new mixin class was added in a separate file that is mixed in with GeoNode.Composer, an can be mixed in with any gxp.Viewer of an SDK application
Merge pull request #812 from simod/base_contactrole

ContactRole save in base
Merge pull request #815 from bartvde/sdkappnew

restructure the GeoNode-GeoExplorer.js file so that it is easier to use ...
Merge branch 'master' of https://github.com/GeoNode/geonode