Ruby update in guide

Fixes #1371

textual changes

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Typo.

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Improve discussions

Implement outdated discussion detection

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

* check for outdated discussions by comparing diff
* improve discussion UI
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Oauth errors page

Fix namespace select

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/371

Improve merge request comments

Fixes #1338

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fix reply button

Don't show reply button if user is not signed in. Fixes #1360

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

If user does not own any group he does not see namespace selector when
visit new project page even if he has master membership in one of
groups. This commit fixes it.
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

When add diff note on 'Changes' page - and then go to 'Discussions' tab
you will not see this discussion unless you reload a page. This commit
fixes it by rendering discussion on 'Discussion' page as soon as you
submit comment on 'Changes' page
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Link to readme from description

If you are viewing a repository for the first time you are likely to view the description. If you want to keep reading after that you can now click a link to the readme. This place is in addition to the README button at the bottom of the right hand menu that is harder to find. If you have edit rights only the description edit button is shown to ensure the text fits, the assumption is that the readme is most interesting for people not yet added to the project.

Add redis requirements

Based on https://groups.google.com/d/msgid/gitlabhq/f60a1b62-e722-4560-b98d-de8e3888dda0%40googlegroups.com?utm_medium=email&utm_source=footer

Missing quote in the install doc

notes count in 1 query  for mr and commits

Return a little more information in Issue webhook

Add ability to search in issue description and issue comments

Fix for copy-pasting formatted text to markdown area

Add Gitlab to Teatro.io

Fixes #7148, Add 'create milestone permission' to docs

Replace HTML5 obsolete center element with CSS.