keep chinese i18n up to date
Merge pull request #498 from williamherry/add_missing_translation

keep chinese i18n up to date
Update Rails for latest security vunerability fixes
Dashboard metrics link to their report pages
Logging in with username and password does not work in prefixed discourse
A site setting for how many similar topics are returned
Moved deleting tests to post_destroyer_spec
New layout for version check on admin dashboard
Move 'upgrade often' nag to the commits widget
Installed version is a link to the commit you're on
Add encoding: utf-8 to locales/ js.erb files to fix rake assets:precompile:all
Update Ember.js
Revert "Add encoding: utf-8 to locales/ js.erb files to fix rake assets:precompile:all"
Add utf-8 headers to all ymls
Revert "Update Rails for latest security vunerability fixes"

This reverts commit 1c5613cdfa6eedb3e65f9ff2fcc79ef0318b5e49.
Apply security fixes as a monkey^M^M^M^M^M^Mfreedom patch
Hash is faster than delegation and simpler to explain
loading a user in a post_action is wasteful
cache reply_to_user_id in post to eliminate a very nasty n+1 query
this should be optimised at some point