Rename Feeds::ChangesetCommentsController to ChangesetComments::FeedsController

We usually create nested controllers with the main controller as the module,
and the nested controller as the specialization, e.g. Users::DeletionsController
or Traces::IconsController.

This then leaves the topic of whether the feed resource is plural, and whether we
are then showing a singular feed or showing a list (index) of objects.

The routes are carefully named so that we have `changesets_comments_feed_path` (the
comments feed for all changesets) vs `changeset_comment_feed_path(changeset)` (the
comments for a singular changeset).

app/views/changeset_comments/feeds/_comment.html.erb

@@ -0,0 +1,7 @@
+<h2><%= t ".comment",
+          :author => comment.author.display_name,
+          :changeset_id => comment.changeset.id.to_s %></h2>
+<div class="changeset-comment" style="margin-top: 5px">
+  <div class="changeset-comment-description" style="font-size: smaller; color: #999999"><%= t ".commented_at_by_html", :when => friendly_date_ago(comment.created_at), :user => comment.author.display_name %></div>
+  <div class="changeset-comment-text"><%= comment.body %></div>
+</div>

app/views/changeset_comments/feeds/_comment.rss.builder

@@ -0,0 +1,14 @@
+xml.item do
+  xml.title t(".comment", :author => comment.author.display_name, :changeset_id => comment.changeset.id.to_s)
+
+  xml.link changeset_url(comment.changeset, :anchor => "c#{comment.id}")
+  xml.guid changeset_url(comment.changeset, :anchor => "c#{comment.id}")
+
+  xml.description do
+    xml.cdata! render(:partial => "comment", :object => comment, :formats => [:html])
+  end
+
+  xml.dc :creator, comment.author.display_name if comment.author
+
+  xml.pubDate comment.created_at.to_fs(:rfc822)
+end

app/views/changeset_comments/feeds/show.rss.builder

@@ -0,0 +1,13 @@
+xml.rss("version" => "2.0",
+        "xmlns:dc" => "http://purl.org/dc/elements/1.1/") do
+  xml.channel do
+    if @changeset
+      xml.title t(".title_particular", :changeset_id => @changeset.id)
+    else
+      xml.title t(".title_all")
+    end
+    xml.link root_url
+
+    xml << render(:partial => "comment", :collection => @comments)
+  end
+end

app/views/changeset_comments/feeds/timeout.atom.builder

@@ -0,0 +1,12 @@
+atom_feed(:language => I18n.locale, :schema_date => 2009,
+          :id => url_for(params.merge(:only_path => false)),
+          :root_url => url_for(params.merge(:only_path => false, :format => nil)),
+          "xmlns:georss" => "http://www.georss.org/georss") do |feed|
+  feed.title @title
+
+  feed.subtitle :type => "xhtml" do |xhtml|
+    xhtml.p do |p|
+      p << t(".sorry")
+    end
+  end
+end

app/views/changeset_comments/feeds/timeout.html.erb

@@ -0,0 +1 @@
+<p><%= t ".sorry" %></p>