Merge branch 'broadcast-message' into 'master'

Print broadcast message if one is available

See gitlab/gitlab-ee#241.

Uses gitlab/gitlabhq!1486.

Text is centered automatically:

```
================================================================================

                Maintenance window planned from 7AM to 9AM PST.

================================================================================
```

Longer text is wrapped automatically:

```
================================================================================

       Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas
    consectetur mi ac risus dapibus, sed rutrum eros elementum. Nunc id elit
     justo. Duis sagittis, orci quis fringilla tempus, odio ipsum convallis
   mauris, in porta quam nisi ac ante. Class aptent taciti sociosqu ad litora
   torquent per conubia nostra, per inceptos himenaeos. Pellentesque habitant
  morbi tristique senectus et netus et malesuada fames ac turpis egestas. Sed
   sit amet blandit diam. Quisque euismod dolor in ligula euismod aliquet in
    non libero. Aenean gravida ac augue vel laoreet. Phasellus vitae dictum
  tellus. In euismod dui sed odio tempus, eget lacinia ante fermentum. Nullam
   lacinia bibendum sollicitudin. Aenean et consequat felis. Curabitur libero
  orci, varius ac ultrices laoreet, blandit eu neque. Nullam eget semper nunc,
        id porta lorem. Phasellus at bibendum lorem, vitae sodales arcu.

================================================================================
```

Existing linebreaks are respected:

```
================================================================================

                          Planned maintenance windows:

                              February 8 7AM - 9AM
                              February 9 7AM - 8AM

================================================================================
```

See merge request !53

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/gitlab_net.rb b/lib/gitlab_net.rb
index c178927..9bfc0d5 100644
--- a/lib/gitlab_net.rb
+++ b/lib/gitlab_net.rb
@@ -41,6 +41,15 @@ class GitlabNet
     JSON.parse(resp.body) rescue nil
   end
 
+  def broadcast_message
+    resp = get("#{host}/broadcast_message")
+    if resp.code == '200'
+      JSON.parse(resp.body) rescue nil
+    else
+      nil
+    end
+  end
+
   def check
     get("#{host}/check")
   end