Cleanup ci dashboard

Part of #2594. Based on !1403

* remove rendering GitLab projects with not enabled CI on CI dashboard
* remove enabling CI for projects from CI dashboard (now its done by simply pushing `.gitlab-ci.yml`)
* simplify the projects query for CI dashboard 

See merge request !1405

Pagination last page

First commit adds a link to the last page.![Screenshot_from_2015-09-17_20-29-00](https://gitlab.com/zj/gitlab-ce/uploads/dcd4f97b8b75c6725ed2a71ba86057b4/Screenshot_from_2015-09-17_20-29-00.png)

Unless there are less than 5 pages to show.![Screenshot_from_2015-09-17_20-34-31](https://gitlab.com/zj/gitlab-ce/uploads/2d730ad11306abcfa83c69627d4f6a7d/Screenshot_from_2015-09-17_20-34-31.png)

Also updates the `Kaminari` gem to the latest version, which is a minor update. [Changelog](https://github.com/amatsuda/kaminari/blob/master/CHANGELOG.rdoc)


See merge request !1334

Add my name to the right page of the changelog

Also update Kaminari gem to the latest version

Update CHANGELOG to add unreleased 8.0.2 entry

[ci skip]

See merge request !1413

[ci skip]

Fix LDAP attribute mapping

See merge request !1408

Fix cases where Markdown did not render links in activity feed

HTML would be stripped in `truncate_if_block` when a comment had multiple lines
and the first wasn't long enough to be truncated. The use of `node.content` would
strip all HTML tags. Using `node.inner_html` retains these tags and puts the
"..." in between paragraph tags.

Closes #2586

See merge request !1401

Fix top margin for sign-in button on public pages

Closes #2615

[ci skip]

See merge request !1412

Closes #2615

Enable CI for gitlab when .gitlab-ci.yml is pushed 

Make enabling CI as easy as pushing file. 

Should be merged after !1402. 

Fixes #2650. Part of #2594 and internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2528

See merge request !1403

Make commit graphs responsive to window width changes

Closes #2653

See merge request !1395

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

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

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

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

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

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

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

Since CI is enabled by pushing .gitlab-ci.yml file there is no need to
add CI project via dashboard
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

Improve Markdown css



See merge request !1389

Prevent double-prefixing of help page paths

Closes #2679 

See merge request !1400

Commits page CI status

Show CI status for each commit row on pages like: Commits, Merge request (commits tab), Compare etc

![Screenshot_2015-09-23_12.34.50](https://gitlab.com/gitlab-org/gitlab-ce/uploads/d40d6a69f76128e32d3a0cb641b3495b/Screenshot_2015-09-23_12.34.50.png)


Fixes #2632 

See merge request !1402

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

Correct markdown.md docs RE use in commit messages.

This is an improvement to the situation covered in issue #1582. It corrects the markdown documentation to demonstrate that GFM cannot currently be used in commit messages.

See merge request !1343

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

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

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

Fix error when MR source branch no longer exists.



See merge request !1393

Fix user identities API

Added ability to update or set the identity of an existing user, like the documentation said it was possible, but actually wasn't.

@DouweM or @stanhu could you please take a look at my code, and see if its sound?

/cc @JobV 

See merge request !1398

HTML would be stripped in `truncate_if_block` when a comment had multiple lines
and the first wasn't long enough to be truncated. The use of `node.content` would
strip all HTML tags. Using `node.inner_html` retains these tags and puts the
"..." in between paragraph tags.

Closes #2586

Prior, because the link "api/README.md" was matched twice, the first
link became "help/help/api/README.md". Now we do a negative lookahead to
make sure the link doesn't start with `help/`.

This fix is still not ideal, see TODO note.

Added ability to update or set the identity of an existing user, like the documentation said it was possible, but actually wasn't.