Improve vBulletin importer

- FEATURE: TopicCreator now supports 'pinned_at' parameter
- FIX: 🐛 FIX TopicQuerySQL to support pinned topic older than 2010
- FIX: 🐛 Properly remove all HTML Entities from Usernames/Titles/Category Names/Groups in vBulletin importer
- FIX: 🐛 Properly handle specific vBulletin BBCode (quotes/mentions)
- FIX: 🐛 Make sure we generate a username from the name of the user instead of a fake email
- FEATURE: Allow for custom timezone in vBulletin importer
- FEATURE: Support for profile pictures/background in vBulletin importer
- FIX: 🐛 merge the categories tree to only 2 levels in vBulletin importer

lib/topic_creator.rb

@@ -86,6 +86,8 @@ class TopicCreator
 
     topic_params[:created_at] = Time.zone.parse(@opts[:created_at].to_s) if @opts[:created_at].present?
 
+    topic_params[:pinned_at] = Time.zone.parse(@opts[:pinned_at].to_s) if @opts[:pinned_at].present?
+
     topic_params
   end