Add ru-RU to home template

Small correction

Added: Ability to delete org avatar.

Collaborators have write access as default, and can be changed via repository
collaboration settings page to change between read, write and admin.

Fix grammar in README

- Allow to delete current avatar

Use relative url when showing forked from

Add ability to delete single wiki pages.

Use hand-written SQL to do complex query

Render emojis in more places.

Repo setting to delete and disable wiki