Bookmarks Plugin

This should be implemented using a clientside plugin, see https://github.com/owncloud/news/wiki/How-to-write-Plugins#clientside-plugin

After clicking a bookmarks icon button (first idea: simply copy the bookmarks app's icon) it should send a request to the bookmarks app looking like this:

POST /apps/bookmarks/bookmarks

{
  "url": article.url,
  "name": article.title
}

The following cases for the response exist:

• Success (HTTP 200-299)
• Error (HTTP 400-599)

A successful request should probably show a notification using the notification API (I'm not sure about this yet).

Error messages should be shown using the ownCloud notification API:

var text = $('<p>').text('error message goes here').html();
OC.Notification.showHtml(text);

The Bookmarks app does not expose an API for this yet but there is an open issue:https://github.com/owncloud/bookmarks/issues/215