Update Since Number
Documentation update
Docblock update

admin-settings.php
Updated return params for documentation

ajax-functions.php
Updated params

credly.php
content-filters.php
Updated Documentation

Brian Please check the badgeos_submission_attachments () function I'm
not 100% sure if it is a String
Updated Documentation
Updated Return Statements
Updated Documentation

Please note I set the boolean value to false by 'default' (see line 76)
please verify this is correct.
Updates to Documentation