diff view on commit with parallel diff view

TODO: fix comment forms to respect left and right columns
Remove outdated steps from 6.2-to-6.3.md
No need to re-download the init script
Fix whitespace
Explain and streamline upgrade steps
Show ruby version on admin dashboard
Merge branch 'show_ruby_version' of /home/git/repositories/gitlab/gitlabhq
Merge pull request #5308 from Popl7/parallel-diffs-side-by-side

diff view on commit with parallel diff view
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Mention parallel diff feature in CHANGELOG for 6.4

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch '6_3_update' of /home/git/repositories/gitlab/gitlabhq
Adding authenticated public mode (internal).

Added visibility_level icons to project view (rather than just text).
Added public projects to search results.
Added ability to restrict visibility levels standard users can set.
gitlab-grack up to 1.1.0

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Use 1.9 hash syntax for some tests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Read-only email field for LDAP user

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix default branch being cached and show old one after change

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Improve preview/edit links for comment form

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Rollback preview button href

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Minor UI improvements

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'feature/readonly_ldap_email' of /home/git/repositories/gitlab/gitlabhq