update fog to 1.25.0 and add multipart upload support

This merge will fix backup uploading problems to s3, closing gitlab-org/gitlab-ce#1059

See merge request !789

Update browser gem to version 0.8.0

Internet Explorer 11.0.9600.17633 has a new User-Agent string (tested using [BrowserStack](https://www.browserstack.com)):

```
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
```

This is supported in v0.8.0 of the browser gem:

https://github.com/fnando/browser/commit/aab7a81d94cc2c31c4b860fa4a9b9a361adf1bab

Closes #1775

See merge request !791

Closes #1775

Move Project Members link from Settings to main menu.

Addresses #2278.

See merge request !1846

Revert "No need to check if `repository_ref` is present"

Addresses #2278.

Make submit hotkey available to all notes forms.

Addresses #2221.

See merge request !1847

Add "Remember me" checkbox to LDAP signin form.

Addresses internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2127.

See merge request !772

Move page-specific JS out of head and into body.

Addresses internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2375.

See merge request !787

Correctly remove already-mentioned commits for cross references

Fixes #1778

See merge request !785

Fixing importing doc

Fixed some details about the importing links and documents.

- Added extra info to Bitbucket importing
- Organized docs in alphabetical order
- Moved Importing link to general documentation, instead of workflow (that's where Sytse asked me to add it)

Thank you @job for merging previous changes.

See merge request !1845

Added line about adding docs in alphabetical order

I believe it's important to be organized when adding documentation, so whenever it applies, I believe documents should be added in alphabetical order.

See merge request !786

No need to check if `repository_ref` is present

Addresses #2221.

Fixes #1778

Removed link "importing to gitlab" because it's in "Documentation". Organized links in alphabetical order.

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

Improve GitLab UI

* move logout button to top right

![Screenshot_2015-06-08_16.56.13](https://gitlab.com/gitlab-org/gitlab-ce/uploads/7de04fab52ad6b742dbea100674f9671/Screenshot_2015-06-08_16.56.13.png)

* remove issue/mr title truncation on index pages. For smaller screens it allow to read complete title of issue

![Screenshot_2015-06-08_16.57.55](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9dcaadfba14f8561c12fcd29a2e70112/Screenshot_2015-06-08_16.57.55.png)

* Improve mobile UI for several pages

See merge request !783

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

There is no need to check if `repository_ref` is present as:
```
      @repository_ref = if repository_ref.present?
                          repository_ref
                        else
                          nil
                        end
```

is as same as doing:

```
@repository_ref = repository_ref
```