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.
Move Go specific meta tag after the atom feed code.
Change web_url_without scheme to web_url_without_protocol.
Explain the culprit and consequences of the 1GB memory recommendation.
Added a simple test to web_url_without_protocol.
 Merge branch 'clone-explanation' into 'master'

Explain where the memory recommendation comes from

The 250MB repo limit is caused by the git command line.

Also see MR !422
add O'Reilly sponsorship in CHANGELOG
 Merge branch 'changelog-base64' into 'master'

Changelog Base64

Add O'Reilly sponsorship in CHANGELOG
Rephrase LDAP check script output

The previous phrasing lead some people to believe that there is a limit
on the number of LDAP users that can sign in to a GitLab instance. That
is not the case; the limit in the check script only applies to the
diagnostic information result set, so that running `rake gitlab:check`
does not output thousands of LDAP users.
 Merge branch 'rephrase_ldap_check' into 'master'

Rephrase LDAP check script output
Merge pull request #5958 from brunoga/go-repository-fetch

 Added support for Go's repository retrieval.
Merge branch 'master' of github.com:gitlabhq/gitlabhq
More entries to CHANGELOG. Version to rc1

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Explain how to use AD userPrincipalName for logins
Update from 6.4 to 6.5 guide

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Further explain userPrincipalName settings
 Merge branch 'user_principal_name' into 'master'

Explain how to use userPrincipalName as the username with AD