Merge pull request #2300 from GitLaboratory/patch-1

Update INSTALL-ubuntu.md
Merge pull request #2295 from vikhyat/badge-system

Titleable badges
Topic page template: add extra wrapper around the username also for the deleted user case (missed in af69b78ecbb79b881f8f577ad61d69875ae9fa99 )
Merge pull request #2299 from borhub/new_html_containers_to_help_custom_theming

User profile page and post page templates: add extra wrappers
BUGFIX: dependencies not tracked correctly
Add missing dependency tracking
updating d-dropdown so long lists of categories can scroll
Merge pull request #2302 from awesomerobot/master

updating d-dropdown so long lists of categories can scroll
If a new user receives a mention, quote or response to their post, allow
them to continue posting in a topic.
FEATURE: support for enabling all upload file types

BUGFIX: authorized extensions is now case insensitive
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
Track the ip address where user was registered
Support 404 routes in the Ember App