Modal Experience Fragment Component

[Request To Comment] To anybody who intends to use the Core Components, please provide your feedback about the following requirements. We want to make sure that we build a component that fits your needs, so don't hesitate to tell us how that component should work, so that you will be able to use it.

User Story:

As a content author, I want to be able to curate modal content as an experience and easily create a link to open that experience in a modal window

Acceptance Criteria:

• Modal content can be authored inside an experience fragment using arbitrary components,
  When the authored modal link is clicked, the XF is requested via ajax and it's content is displayed in a modal
• The modal can be closed by clicking outside the modal window or by clicking an "x" icon to close
• Modal will be implemented as a new template for experience fragments, which authors will use to create the Modal content
• A Sling rewriter extension will check for any links to XF pages created using this template, adding a class "cq-xf-modal" to the anchor tag to indicate it will be opened as a modal
• client library javascript code will check for links with the "cq-xf-modal" class applied and bind a click event which will request the xf page content via ajax and show it in the modal.

No files or tests are named. Start by tracing the existing experience-fragment template, Sling rewriter extension, and client-library JavaScript entry points described in the request. Done means modal content can be authored, opened through marked links, fetched via Ajax, and closed as specified.