Add translation for Romanian.
FEATURE: Add a plugin callback when editing a post

FIX: Wrap PostRevisor database work in a transaction
FIX: Markdown parser: empty links and bbcode parsed as link refs
FIX: Readd the dismiss keybindings
https://meta.discourse.org/t/new-updated-bar-and-dismiss-new-button-unreachable-by-keyboard/18946/10?u=cpradio
Merge pull request #2737 from techAPJ/patch-3

correct copy for db_shared_buffers
wrong syntax of ruby on contributing.md fixed
improvements to admin quick start guide
copyedits on Welcome to Lounge
UX: clarify notify user flag option is just a PM
hide poster avatars when only two posts
Merge pull request #2738 from meinac/contributing

wrong syntax of ruby on contributing.md fixed
Merge pull request #2734 from cpradio/readd-dismiss-bindings

FIX: Readd the dismiss keybindings
Merge pull request #2731 from Elberet/fix-parser

FIX: Markdown parser: empty links and bbcode parsed as link refs
Merge pull request #2718 from riking/plugin-events

FEATURE: Add a plugin callback when editing a post
Merge pull request #2711 from hydrarulz/localize_romanian

Add translation for Romanian.
Renamed `poster-expansion` to `user-expansion` because it's not specific
to a poster anymore.
FIX: Re-enable filtering on user expansions on topics
FIX: Redirect to Top was showing "latest" content because it was in the
preload store.
Merge pull request #2739 from techAPJ/patch-1

hide poster avatars when only two posts
FIX: Do not perform grants if badges are disabled