more group progress, UI getting there, controller mostly done

changed it so notify moderators goes to the moderators group
allow admins to grant self moderation and revoke self moderation

db/migrate/20130509040248_update_sequence_for_groups.rb

@@ -0,0 +1,11 @@
+class UpdateSequenceForGroups < ActiveRecord::Migration
+  def up
+    # even if you alter a sequence you still need to set the seq
+    execute <<SQL
+    SELECT setval('groups_id_seq', 40)
+SQL
+  end
+
+  def down
+  end
+end

db/migrate/20130509041351_add_unique_name_to_groups.rb

@@ -0,0 +1,5 @@
+class AddUniqueNameToGroups < ActiveRecord::Migration
+  def change
+    add_index :groups, [:name], unique: true
+  end
+end