Move the script tag under the div

This way the div exists in the DOM before the script is executed
The ID will always be available here
reference the v2 js
Don't auto play embedded media by default
Add a data-version to the embed code

This will make it easier to identify what version the embed code is when scanning sites (if we ever need to).
Use an attribute name that better identifies the service
add a class to the embed
Merge pull request #102 from mfairchild365/embed

Version 2 Embed code updates