made contributor badge changable via web interface

app/controllers/ajax/moderation_controller.rb

@@ -118,7 +118,7 @@ class Ajax::ModerationController < ApplicationController
     target_user = User.find_by_screen_name(params[:user])
 
     @message = "nope!"
-    return unless %w(banned blogger supporter moderator admin).include? params[:type].downcase
+    return unless %w(banned blogger supporter moderator admin contributor).include? params[:type].downcase
 
     if (%w(supporter moderator admin).include?(params[:type].downcase) and !current_user.admin?) or
       (params[:type].downcase == 'banned' and target_user.admin?)

app/views/user/_modal_privileges.html.haml

@@ -14,6 +14,7 @@
         - unless @user.admin?
           = render 'user/modal_privileges_item', privilege: 'banned', description: 'Hit the user with ye olde banhammer', user: @user
         = render 'user/modal_privileges_item', privilege: 'blogger', description: 'The user gets that privilege if they blogged something (nice) about Retrospring.', user: @user
+        = render 'user/modal_privileges_item', privilege: 'contributor', description: "This user has contributed to justask#{" (the software behind #{APP_CONFIG['site_name']})" unless APP_CONFIG['site_name'] == 'justask'}.", user: @user
         - if current_user.admin?
           = render 'user/modal_privileges_item', privilege: 'supporter', description: 'This user monetarily supports the site', user: @user
           = render 'user/modal_privileges_item', privilege: 'moderator', description: 'Someone trustworthy enough to help managing reports',user: @user