tree css fixes

app/assets/stylesheets/tree.scss

@@ -182,6 +182,7 @@ table.highlighttable .linenodiv pre {
 }
 
 a.tree-commit-link { 
+  color: #666;
   &:hover { 
     text-decoration: underline;
   }

app/views/refs/_tree_item.html.haml

@@ -14,5 +14,5 @@
   %td.commit
     - tm = @project.team_member_by_name_or_email(content_commit.author_email, content_commit.author_name)
     - if tm
-      = link_to "[#{tm.user_name}]", project_team_member_path(@project, tm)
+      %strong= link_to "[#{tm.user_name}]", project_team_member_path(@project, tm)
     = link_to truncate(content_commit.safe_message, :length => tm ? 30 : 50), project_commit_path(@project, content_commit.id), :class => "tree-commit-link"