Getting content publishing/unpublishing hooked up (from the content item list)

- moved publishing control to the Contents module
- included some prep for adding bulk actions and filtering to the content item list
- publish, unpublish and remove actions need downlevel interstitial pages (functionality only workes w/ JS at the moment)

--HG--
branch : dev

src/Orchard.Web/Core/Contents/ViewModels/PublishContentViewModel.cs

@@ -0,0 +1,28 @@
+using Orchard.ContentManagement;
+
+namespace Orchard.Core.Contents.ViewModels {
+    public class PublishContentViewModel {
+        public PublishContentViewModel(ContentItem contentItem) {
+            ContentItem = contentItem;
+        }
+
+        public ContentItem ContentItem { get; private set; }
+
+        public bool IsPublished {
+            get { return ContentItem.VersionRecord != null && ContentItem.VersionRecord.Published; }
+        }
+
+        public bool HasDraft {
+            get {
+                return (
+                    (ContentItem.VersionRecord != null)
+                    && ((ContentItem.VersionRecord.Published == false)
+                        || (ContentItem.VersionRecord.Published && ContentItem.VersionRecord.Latest == false)));
+            }
+        }
+
+        public bool HasPublished {
+            get { return IsPublished || ContentItem.ContentManager.Get(ContentItem.Id, VersionOptions.Published) != null; }
+        }
+    }
+}