Merge branch 'project-plus-icon' into 'master'

Replaced icon for project page dropdown button

Improve for !971

![Screenshot_2015-07-13_23.37.01](https://gitlab.com/gitlab-org/gitlab-ce/uploads/2b168c6f8a07f33cab4ca8f735646f8a/Screenshot_2015-07-13_23.37.01.png)

See merge request !973

app/views/projects/_home_panel.html.haml

@@ -23,6 +23,6 @@
         = link_to archive_namespace_project_repository_path(@project.namespace, @project, ref: @ref, format: 'zip'), class: 'btn', rel: 'nofollow' do
           %i.fa.fa-download
 
-    = render 'projects/dropdown'
+    = render 'projects/buttons/dropdown'
 
   = render "shared/clone_panel"

app/views/projects/_dropdown.html.haml → app/views/projects/buttons/_dropdown.html.haml

 - if current_user
   %span.dropdown
     %a.dropdown-toggle.btn.btn-new{href: '#', "data-toggle" => "dropdown"}
-      %i.fa.fa-bars
+      %i.fa.fa-plus
     %ul.dropdown-menu
       - if @project.issues_enabled && can?(current_user, :create_issue, @project)
         %li
@@ -26,7 +26,6 @@
             New git branch
         %li
           = link_to new_namespace_project_tag_path(@project.namespace, @project) do
-            %i.fa.fa-tag
             New git tag