Update mailroom to 0.5.2

Fixes #2698 and #2711.

See merge request !1424

Add the newrelic-grape gem

This allows us to see a breakdown of API requests in New Relic.

See merge request !1419

Fix default avatar not showing up in network graph

The change in 71cdb249 removed the `/assets` path in the default avatar to eliminate runtime errors, but this was one place where `image_path` was missed. If the user full URL is specified, `image_path` does nothing.

Closes https://github.com/gitlabhq/gitlabhq/issues/9657

See merge request !1411

Add Troubleshooting section to 8.0 docs

[ci skip]

See merge request !1416

Refer to Apache templates in 8.0 update guide

[ci skip]

See merge request !1426

Closes https://github.com/gitlabhq/gitlabhq/issues/9657

Remove CI dashboard

With CI status integrated at GitLab projects page there is no reason to keep it
anymore.
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Part of #2594 

See merge request !1422

With CI status integrated at GitLab projects page there is no reason to keep it
anymore.
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Show CI status on Your projects page and Starred projects page
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Part of #2594 

Screenshot: 

![Screenshot_2015-09-24_13.42.52](https://gitlab.com/gitlab-org/gitlab-ce/uploads/0516ea02b72457a431bd72d3f6619dfe/Screenshot_2015-09-24_13.42.52.png)


See merge request !1420

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

Use standard Markdown font in Markdown preview instead of fixed-width font

Closes #2585

See merge request !1414

Build status on commit page

Screenshot:

![Screenshot_2015-09-24_11.29.54](https://gitlab.com/gitlab-org/gitlab-ce/uploads/49d1b9dc60d328dceaf771b5e44726ca/Screenshot_2015-09-24_11.29.54.png)

Part of #2594 

See merge request !1418

This allows us to see a breakdown of API requests in New Relic.

Fix Slack notification URL and remove the usage of Ci::RoutesHelper

Fix for #2644

/cc @dzaporozhets @rspeicher 

See merge request !1391

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>

Move CI charts to project graphs area

Part of #2594 

Should be merged after !1405 


Same page but moved to another place 

![Screenshot_2015-09-23_16.25.15](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ef7266de0528bd6dd3f95159e161ea9a/Screenshot_2015-09-23_16.25.15.png)


See merge request !1407

Made some steps to add SSH keys more clear



See merge request !1936

Help page improvements

- Only signed-in users can see version information
- Add "Community Edition" text so the header is
  less barren when version information is hidden
- Minor copy edits
- Make all "Quick help" link text the entire body
  of the link. Prior, it wasn't obvious which part
  of each item was an actual link.

Closes #2721 

See merge request !1415

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

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

Remove git refs used internally by GitLab from network graph

GitLab 8.0 removed satellites and started using git refs that began with `refs/merge-requests/XXX` and `refs/tmp/XXX`, which showed up in an ugly way in the network graph:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/150eb7ae5f07f0d4793589b5eac462db/image.png)


Closes #2702

See merge request !1410

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

We want users to know what features they have available (and to pressure
their admins to upgrade).

Add my name to the right page of the changelog