* Direct avatar rendering
This adds new template helpers for avatar rendering which output image
elements with direct links to avatars which makes them cacheable by the
browsers.
This should be a major performance improvment for pages with many avatars.
* fix avatars of other user's profile pages
* fix top border on user avatar name
* uncircle avatars
* remove old incomplete avatar selector
* use title attribute for name and add it back on blame
* minor refactor
* tweak comments
* fix url path join and adjust test to new result
* dedupe functions
* Avatar support minio
* Support repo avatar minio storage
* Add missing migration
* Fix bug
* Fix test
* Add test for minio store type on avatars and repo avatars; Add documents
* Fix bug
* Fix bug
* Add back missed avatar link method
* refactor codes
* Simplify the codes
* Code improvements
* Fix lint
* Fix test mysql
* Fix test mysql
* Fix test mysql
* Fix settings
* Fix test
* fix test
* Fix bug
silverwind
Paweł Bogusławski
Lunny Xiao