move custom fields into its own concern
Add CustomFields to Post, Category and Group
fix double save missing error by using copy not actual reference
Add Custom Fields on Topics
Add Support for Arrays to CustomFields
Move Concern from lib into app/models. refs #2279
use more explicit naming to prevent name clashes. fixes build.
Ensure Reload reloads custom_fields, too
FEATURE: usernames are now on top.
Merge pull request #2297 from ligthyear/custom-fields

Custom fields for Topic, Category, Post and Group
some adjustments for the username relocation...
Merge pull request #2305 from awesomerobot/master

some adjustments for the username relocation...
BUGFIX: improve alignment
BUGFIX: merge played up correct visual styles
BUGFIX: styling
change "Log In" to "Sign In"

because
http://www.designcult.org/2011/08/why-do-we-call-in-logging-in.html
copyedit to explain reply rule
minor copyedits on flagging
FEATURE: add a specific flag reason when a post has been hidden
Proof of concept: Load controller via ES6 module in Discourse