add map_sdk.js and sdk_header.html template to make it easier to integra...

add map_sdk.js and sdk_header.html template to make it easier to integrate OpenGeo Suite SDK apps in GeoNode

cannot edit style on raster layers in geoexplorer

fix issue reported by @simod I now get a Uncaught TypeError: Cannot read property 'Save' of undefined here both at layer/upload and document/upload pages.

restructure the GeoNode-GeoExplorer.js file so that it is easier to use ...

ContactRole save in base

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

Document checks

Adds fallback to default auth backend in has_perm permission lookup function

Make ResourceBase concrete