diff view on commit with parallel diff view

TODO: fix comment forms to respect left and right columns
Integration with Assembla
minor fix to command
Merge pull request #5654 from sairam/patch-1

minor fix to command
Merge pull request #5640 from carlosparamio/assembla_service

Integration with Assembla
Update ruby to patchlevel 353 (security update)

https://www.ruby-lang.org/en/news/2013/11/22/heap-overflow-in-floating-point-parsing-cve-2013-4164/
Merge branch 'update_ruby_master' of /home/git/repositories/gitlab/gitlabhq
Enable redis in travis

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Added sorting to project issues page
Merge pull request #5661 from jasonblanchard/sorting-project-issues

Added sorting to project issues page
Noted the change to the gitlab-shell config.yml, which changed substantially in recent versions and broke the upgrade when not updated
Merge pull request #5675 from augustf/patch-1

Noted the change to the gitlab-shell config.yml
Starting 6.4.0.pre

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Update installation.md to use 6-3-stable branch
Start writing doc about GitLab architecture for developers

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge pull request #5684 from frdmn/master

Update installation.md to use 6-3-stable branch
New gem versions

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Add Ruby upgrade instructions
Be more specific about what Ruby to use