Added description for Redis connection via unix socket
Update installation.md

Add the -y option to the python apt-get install commands to be consistent with the rest of the Document.
Search and replace relative links in tree/readme
Show links with correct ref.
Check for wiki.
Match the brackets so we don't replace the regular text.
Merge pull request #5278 from ZaaLabs/master

Small consistency addition for installation.md
avatar upload on profile page
Use proper titles for issues trackers
Merge branch 'master' into relative_links_in_documentation
Merge pull request #5281 from Popl7/upload_avatar_to_gitlab

avatar upload on profile page
Improve Profile settings UI
Merge pull request #5291 from astratto/title_issue_trackers

Use proper titles for issues trackers
Remove test case that cause Mysql Deadlock
Split.
API: new feature - remove project[D
API: specs for remove project
API: docs for remove project
Send devise emails async
Rename method to avoid clashes.