Closes #1305

Fix bug where error messages from Dropzone would not be displayed on the issues page

Closes #1258

successful Git over HTTP authentication.

Add logging when a ban goes into effect for debugging.

Issue #1171

for his work and help)

On some misconfigured GitLab servers, if you look in production.log it looks
like all requests come from 127.0.0.1. To avoid unwanted banning we
white-list 127.0.0.1 with this commit.

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>

This setting was not longer used in GitLab, so i think it can be
removed.
Signed-off-by: NJeroen van Baarsen <jeroenvanbaarsen@gmail.com>

A test was broken if running on a non-standard port.
Made checking for (non-)standard port more robust.
Changed gitlab_on_non_standard_port to gitlab_on_standard_port (less negative).

Before this commit gitlab-shell but me placed directly in home dir.
Ex:
  /home/git/gitlab-shell

After this change you can place gitlab-shell in custom location.
Ex:
  /Users/developer/gitlab/gitlab-shell
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

Added visibility_level icons to project view (rather than just text).
Added public projects to search results.
Added ability to restrict visibility levels standard users can set.