Add/remove issue watchers via the REST API (#6727).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11290 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/issues/show.api.rsb

@@ -64,4 +64,10 @@ api.issue do
       end
     end
   end if include_in_api_response?('journals')
+
+  api.array :watchers do
+    @issue.watcher_users.each do |user|
+      api.user :id => user.id, :name => user.name
+    end
+  end if include_in_api_response?('watchers') && User.current.allowed_to?(:view_issue_watchers, @issue.project)
 end