Defined developer/trainingmod rank

Defined the developer and trainingmod ranks to make it easier for others
to understand, and to make it easier to give them permissions in the
future (if needed).

app/models/user.rb

@@ -61,6 +61,14 @@ class User < ActiveRecord::Base
     !!(self.role >= :normal)
   end
 
+  def trainingmod?
+    !!(self.role >= :trainingmod)
+  end
+
+  def developer?
+    !!(self.role >= :developer)
+  end
+
   def mod?
     !!(self.role >= :mod)
   end

db/seeds.rb

@@ -5,6 +5,8 @@ Role.create!([
   {name: "disabled", value: 1, color: "#ccc"},
   {name: "banned", value: 2, color: "#ccc"},
   {name: "normal", value: 10, color: "#282"},
+  {name: "trainingmod", value: 40, color: "#fa5"},
+  {name: "developer", value: 70, color: "#a0a"},
   {name: "mod", value: 100, color: "#6af"},
   {name: "admin", value: 200, color: "#d22"},
   {name: "superadmin", value: 500, color: "#d22"}