AMPforWP - AMP Stories 1.4.16

* Feature Added: =* Added Shortcode support to use AMP Story.

* Features Added: =
* Added support to include Disclaimer and Privacy page in the Bookend.
* Added support to include Video in background for Design 1 and 3.
* Added support to include a Title and Description in Design 4.
* Bug Fixed: =
* Resolved the Fatal error: Uncaught Error: Call to undefined function ampforwp_is_home()

* Bugs Fixed: =
* Resolved the issue of Meta description from Yoast is not displayed.
* Resolved the issue of AMP story page not working on /amp.
* Resolved the issue of Custom CSS gets disappeared when clicked on the Save draft.