Checking the site with the PageSpeed extension, one of the reports was
in reducing image size.  This reduced the number of bytes by 67%.

It was done with optipng -o7 -fix *.png in the app/assets/images dir.

References:
  optipng: http://optipng.sourceforge.net/
  PageSpeed extension: https://developers.google.com/speed/docs/insights/using_chrome

Reset buttons/links on the reset password page

Update installation.md

Updated instructions to include proper stable. Otherwise they fail due to Rack extensions required below.

Fix for issue #5431

If you enable GitLab CI for project you will be able to clone project
source code with next command:
git clone http://gitlab-ci-token:XXXXXXXXXXXX@host:project.git
Requires for GitLab CI 4.0

Added git command to change shell to 1.1.0 to make sure the check passes

Non-logic wording and grammar for the new group view

Made stop message make more sense, app_root now uses the user name.

Typo fixed

Expand refs constraints to include valid characters

Fixes #4831, #4865, #4932

"ssending" to "sending"

fixed maximum avatar size in changelog