Updated gemfile, added comments to repairer, updater, and uninstaller task stubs

lib/application_manager/tasks/uninstaller.rb

@@ -1,6 +1,21 @@
 class W3DHub
   class ApplicationManager
     class Uninstaller < Task
+      def type
+        :uninstaller
+      end
+
+      def exec_task
+        # TODO: cherrypick or nuke installation folder
+        # A:
+        #   fetch manifests
+        #   load manifests
+        #   build list of files
+        #   delete list of files
+        # B:
+        #   Nuke installation folder
+        # mark application as uninstalled
+      end
     end
   end
 end