Fix infinite loop when SAML was incorrectly configured.

See merge request !1170

Fix gitlab:env:info rake task.

Found doing QA.

See merge request !1169

Clear cache to prevent listing deleted branches after MR removes source branch

Closes #2272

See merge request !1160

disallow irrelevant pages by defaults in robots

capitalize URL in "Home page URL"

Update default robots.txt rules to disallow irrelevant pages that search
engines should not care about. This will still allow important pages
like the files, commit details, merge requests, issues, comments, etc.
to be crawled.

Upgrade gitlab_git to 7.2.14 to ignore CRLFs in .gitmodules

Closes #2262

See merge request !1171

Closes #2262

Remove the `gfm_with_options` helper

It was redundant because `gfm` also took options.

See merge request !1152

Fix bug where backslashes in inline diffs could be dropped

This MR fixes a bug in inline diff generation causing backslashes to be dropped. For example, the input:

```
input.to_s.sub(/[\r\n].+/,'').sub(/\\[rn].+/, '').strip
```

The second backslash is dropped in the second `sub` statement:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/16e513894f7ecda1b111fe7d43e7f388/image.png)

With this fix, it looks like:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/90fd635a937a68f1b2403740ebc75e3a/image.png)

Closes #2253

See merge request !1143

Improve error message display when project fails to import

Follow-up to !1134.

New screenshot:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/c1a8ffa30ab3b78010e16cf65c2ff438/image.png)

See merge request !1138