Merge branch 'improve/repo_head_update'

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Conflicts:
	app/models/project.rb

diff --cc app/models/project.rb
index d389579,5f0303d..1bfc27d
--- 1/app/models/project.rb
--- 2/app/models/project.rb
+++ b/app/models/project.rb
@@@ -475,11 -473,8 +475,16 @@@ class Project < ActiveRecord::Bas
      visibility_level
    end
  
 +  def archive!
 +    update_attribute(:archived, true)
 +  end
 +
 +  def unarchive!
 +    update_attribute(:archived, false)
 +  end
++
+   def change_head(branch)
+     gitlab_shell.update_repository_head(self.path_with_namespace, branch)
+     reload_default_branch
+   end
  end