Added stream content 'kind of' web script, modified ContentGet webscript to use common code, create GET thumbnail method based on stream content kind of web script

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@9395 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/jscript/ScriptNode.java

@@ -1924,6 +1924,12 @@ public class ScriptNode implements Serializable, Scopeable
         return new ScriptThumbnail(thumbnailNodeRef, this.services, this.scope);
     }
 
+    /**
+     * Get the given thumbnail for the content property
+     * 
+     * @param thumbnailName     the thumbnail name
+     * @return ScriptThumbnail  the thumbnail
+     */
     public ScriptThumbnail getThumbnail(String thumbnailName)
     {
         ScriptThumbnail result = null;