Add new diary comment template

To be used when create comment action fails.

app/views/diary_comments/new.html.erb

@@ -0,0 +1,12 @@
+<% content_for :heading do %>
+  <h1><%= t ".heading" %></h1>
+<% end %>
+
+<%= render :partial => "diary_entries/diary_entry_heading", :object => @entry, :as => "diary_entry" %>
+
+<h3><%= t "diary_entries.show.leave_a_comment" %></h3>
+
+<%= bootstrap_form_for @diary_comment, :url => comment_diary_entry_path(@entry.user, @entry) do |f| %>
+  <%= f.richtext_field :body, :cols => 80, :rows => 20, :hide_label => true %>
+  <%= f.primary %>
+<% end %>

config/locales/en.yml

@@ -609,6 +609,8 @@ en:
       comment: Comment
       newer_comments: "Newer Comments"
       older_comments: "Older Comments"
+    new:
+      heading: Add a comment to the following diary entry discussion?
   doorkeeper:
     errors:
       messages: