Merge pull request ppy#2746 from nanaya/ranking_eta

Update ranking eta calculation

Merge pull request ppy#2626 from VPeruS/patch-2

Remove one "this" word in russian translation

Merge pull request ppy#2526 from Ephemeralis/packmedals-jan2018

Add Mappers Guild Pack I web badge assets

Merge pull request ppy#2355 from LiquidPL/docker-fixes

Docker updates

Merge pull request ppy#2315 from nanaya/pagination_link

Easier to click pagination

Merge pull request ppy#2279 from nanaya/post_title_check

Don't fail on deleted topic in search

Merge pull request ppy#2253 from nanaya/hide_deleted_empty_beatmaps

Hide deleted beatmaps with no discussions

Merge pull request ppy#2075 from notbakaneko/feature/index-via-readonly

Use read-only connection for indexing query instead of primary

Merge pull request ppy#2066 from nanaya/fix_users_show

Limit parsing params to relevant actions

Merge pull request ppy#2026 from nanaya/wiki_search

Index wiki page title