Allow public repo searching

GITLAB-1386

Change-Id: I9a0bbe8db1a9bb00cef33b3e1854d78844b70a45
Updated convience method to private
Fix #5313 hipchat 0.14.0 to use http_proxy
 Added support for Go's repository retrieval.

 - Simply adds the releavant meta link in the project's show action.
 - Information about this meta tag can be found here:
   http://golang.org/cmd/go/#hdr-Remote_import_paths
Use project methods instead of attributes.

- This should work correctly in all cases now.
- Added a new project method that returns the web url for a project without
  the scheme prefix.
Use web_url for web_url_without_scheme.

- Previus version was still incorrect as it ignored cases where GitLab would
  be installed in a custom location.
- This assumes that if this method can be calle, web_url will return a valid
  URL.
Simplify upgrade guide based on 6-4 functionality mentioned by Jacob.
Add note for assignee changes

Change to username per @PixnBits suggestion
Instructions should create a merge commit and give people a chance to test the branch we are going to merge.
Update clone panel to use input group.

Use clone panel in `Git Access` section of wiki.
Fix download archive menu for tree view.

This fixes the issue of the menu going outside of the main `container`.
Better style of username for User#show page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge pull request #6008 from jhollingsworth/fix/zip-archive-ui

Fix download archive menu for tree view.
Fix white line at top of no-ssh-key-message
Update the init.d file to the correct locationof the example defaults file
Update the example defaults, include the rest of he variables
Better UI for appearence page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix tree table overflow

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge pull request #5427 from karlhungus/feature_search_code_in_public_repos

Allow public repo searching
Fix public project search

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Ask people to link bakc and be prepared for feedback.