Show edit readme from project home page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/projects/show.html.haml

@@ -43,10 +43,11 @@
   - if readme = @repository.readme
     %article.readme-holder#README
       .clearfix
-        %small.pull-right
-          = link_to namespace_project_blob_path(@project.namespace, @project, tree_join(@repository.root_ref, readme.name)), class: 'light' do
-            %i.fa.fa-file
-            = readme.name
+        .pull-right
+           
+          - if can?(current_user, :push_code, @project)
+            = link_to namespace_project_edit_blob_path(@project.namespace, @project, tree_join(@repository.root_ref, readme.name)), class: 'light' do
+              %i.fa.fa-pencil
       .wiki
         = render_readme(readme)
   - else