- FEATURE: revamped poll plugin

- add User.staff scope
- inject MessageBus into Ember views (so it can be used by the poll plugin)
- REFACTOR: use more accurate is_first_post? method instead of post_number == 1
- FEATURE: add support for JSON-typed custom fields
- FEATURE: allow plugins to add validation
- FEATURE: add post_custom_fields to PostSerializer
- FEATURE: allow plugins to whitelist post_custom_fields
- FIX: don't bump when post did not save successfully
- FEATURE: polls are supported in any post
- FEATURE: allow for multiple polls in the same post
- FEATURE: multiple choice polls
- FEATURE: rating polls
- FEATURE: new dialect allowing users to preview polls in the composer

lib/guardian/post_guardian.rb

@@ -116,7 +116,7 @@ module PostGuardian
   # Deleting Methods
   def can_delete_post?(post)
     # Can't delete the first post
-    return false if post.post_number == 1
+    return false if post.is_first_post?
 
     # Can't delete after post_edit_time_limit minutes have passed
     return false if !is_staff? && post.edit_time_limit_expired?