Disable turbolink on links pointing out to CI services
### What does this MR do?
This MR adds 'data-no-turbolink' attribute into all links pointing to CI services.
### Are there points in the code the reviewer needs to double check?
No
### Why was this MR needed?
In rare cases where gitlab and CI service is installed on the same host, turbolink will be used for links between those two. This may result in corrupted css and javascript.
This change is harmless for installations that do not share the domain name for GitLab and CI system - in such case, all links modified are already pointing out outside of the domain so turbolink won't handle them.
### What are the relevant issue numbers / Feature requests?
I consider this a small fix, no issue has been added.
See merge request !305
Show tags in commit view
### What does this MR do?
With this MR you can see the assigned tags for a commit in the commit view.
### Are there points in the code the reviewer needs to double check?
I don't think so. But it would be awesome if the reviewer can tell me how to add a tag to the sample_commit in spec/support/repo_helpers.rb.
Then I can add a test for the new tag_names_contains method as soon as possible :)
### Why was this MR needed?
At the moment if one click on a commit will see details such as: parent commit, amount of additions, deletions, but will not see if this commit has Tag linked to it.
Showing branch, tag details will give better overview about the commit
### What are the relevant issue numbers / Feature requests?
Feature request: http://feedback.gitlab.com/forums/176466-general/suggestions/3962044-show-tags-in-commit-view
### Screenshots

@dblessing Can you take a look at this MR as well please?
See merge request !297
Add syntax colors to diffs in email-on-push notifications
## What does this MR do?
This MR adds syntaxhighlighting to the email-on-push notifications.
## Are there points in the code the reviewer needs to double check?
No
## Why was this MR needed?
Currently the diff in email-on-push notifications is just a monochrome diff that's hard to read.
This MR adds colored syntaxhighlighting to the mails.
## What are the relevant issue numbers / Feature requests?
* It closes https://github.com/gitlabhq/gitlabhq/issues/6994
* There is a Discussion in the Feedback Forum: http://feedback.gitlab.com/forums/176466-general/suggestions/5802256-add-color-to-diffs-in-email-on-push-service-to-htm
* A pull request for this already existed, but was closed. https://github.com/gitlabhq/gitlabhq/pull/7739
## Screenshots
see prior Pull Request for a screenshot
See merge request !295
Remove password strength indicator
We were having the following issues:
- the indicator would sometimes stay red even if the password that was
entered was long enough;
- the indicator had a middle yellow signal: what does that mean?
- the red/green backgrounds were not color-blind-friendly.
See merge request !1399