Uses sendwithus' API when a new comment is posted

Uses sendwithus' API when a new comment is posted. Each property is
accessible and can be used with sendwithus’ template system.

https://codex.wordpress.org/Function_Reference/get_comment
Merge branch 'master' of https://github.com/sendwithus/sendwithus_wordpress

Conflicts:
	sendwithus.php