Merge branch 'fix_architecture_img' into 'master'

Fix Architecture Img

Image in architecture doc was not showing correctly. Now it is.

doc/development/architecture.md

@@ -28,7 +28,7 @@ To serve repositories over SSH there's an add-on application called gitlab-shell
 
 ## Components
 
-![GitLab Diagram Overview](resources/gitlab_diagram_overview.png "GitLab Diagram Overview")
+![GitLab Diagram Overview](resources/gitlab_diagram_overview.png)
 
 A typical install of GitLab will be on Ubuntu Linux or RHEL/CentOS.
 It uses Nginx or Apache as a web front end to proxypass the Unicorn web server.